Number 4

Number 4 is said 🔊, write in letters as follows: four . Ordinal number 4th is said 🔊 and write: fourth. The meaning of number 4: Basic maths, advanced mathematics and properties, computer science, numerology, codes and images, writing and naming in other languages, other interesting facts and comments.

Useful information about number 4

The decimal (Arabic) number 4 converted to a Roman number is IV. Roman and decimal number conversions.
The number 4 converted to a Mayan number is mayan number 4
Decimal and Mayan number conversions.

Weight conversion

4 kilograms (kg) = 8.8 pounds (lb)
4 pounds (lb) = 1.8 kilograms (kg)

Length conversion

4 kilometers (km) equals to 2.485 miles (mi).
4 miles (mi) equals to 6.437 kilometers (km).
4 meters (m) equals to 6.437 feet (ft).
4 feet (ft) equals 1.219 meters (m).
4 centimeters (cm) equals to 1.6 inches (in).
4 inches (in) equals to 10.2 centimeters (cm).

Temperature conversion

4° Fahrenheit (°F) equals to 39.2° Celsius (°C)
4° Celsius (°C) equals to -15.6° Fahrenheit (°F)

Power conversion

4 Horsepower (hp) equals to 2.94 kilowatts (kW)
4 kilowatts (kW) equals to 5.44 horsepower (hp)

Codes and images of the number 4

Number 4 morse code: ....-
Sign language for number 4: Sign language for number 4
Images of the number
Image (1) of the numberImage (2) of the number
Number 4 black image Number 4 red image
There is no copyright for these images. Number 4 infographic.
More images, other sizes, codes and colors ...

Gregorian, Hebrew, Islamic, Persian and Buddhist year (calendar)

Gregorian year 4 is Buddhist year 547.
Buddhist year 4 is Gregorian year 539 a. C.
Gregorian year 4 is Islamic year -637 or -636.
Islamic year 4 is Gregorian year 625 or 626.
Gregorian year 4 is Persian year -619 or -618.
Persian year 4 is Gregorian 625 or 626.
Gregorian year 4 is Hebrew year 3764 or 3765.
Hebrew year 4 is Gregorian year 3756 a. C.
The Buddhist calendar is used in Sri Lanka, Cambodia, Laos, Thailand, and Burma. The Persian calendar is official in Iran and Afghanistan.

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Mathematics of no. 4


Multiplication table of 4

4 multiplied by two equals 8 (4 x 2 = 8).
4 multiplied by three equals 12 (4 x 3 = 12).
4 multiplied by four equals 16 (4 x 4 = 16).
4 multiplied by five equals 20 (4 x 5 = 20).
show multiplications by 6, 7, 8, 9 ...

Fractions: decimal fraction and common fraction

Fraction table of 4

Half of 4 is 2 (4 / 2 = 2).
One third of 4 is 1,3333 (4 / 3 = 1,3333 = 1 1/3).
One quarter of 4 is 1 (4 / 4 = 1).
One fifth of 4 is 0,8 (4 / 5 = 0,8 = 4/5).
show fractions by 6, 7, 8, 9 ...



Advanced math operations

Is Prime?

The number 4 is not a prime number. The closest prime numbers are 3, 5.
4th prime number in order is 7.

Factorization and dividers

Factorization 2 * 2 = 4
Divisors of number 4 are 1 , 2 , 4
Total Divisors 3.
Sum of Divisors 7.


The second power of 42 is 16.
The third power of 43 is 64.


The square root √4 is 2 raíz cuadrada exacta.
The cube root of 34 is 1,587401.


The natural logarithm of No. ln 4 = loge 4 = 1,386294.
The logarithm to base 10 of No. log10 4 = 0,60206.
The Napierian logarithm of No. log1/e 4 = -1,386294.

Trigonometric functions

The cosine of 4 is -0,653644.
The sine of 4 is -0,756802.
The tangent of 4 is 1,157821.

Properties of the number 4

Is a Friedman number: No
Is a Fibonacci number: No
Is a Bell number: No
Is a palindromic number: No
Is a pentagonal number: No
Is a perfect number: No

Number 4 in Computer Science

Code typeCode value
Unix timeUnix time 4 is equal to Thursday Jan. 1, 1970, 12:04 a.m. GMT
IPv4, IPv6Number 4 internet address in dotted format v4, v6 ::4
4 Decimal = 100 Binary
4 Decimal = 11 Ternary
4 Decimal = 4 Octal
4 Decimal = 4 Hexadecimal (0x4 hex)
4 BASE64NA==
4 MD5a87ff679a2f3e71d9181a67b7542122c
4 SHA11b6453892473a467d07372d45eb05abc2031647a
More SHA codes related to the number 4 ...

Numerology 4

The number four (4) came to establish stability and to follow the process in the world. It needs to apply a clear purpose to develop internal stability. It evokes a sense of duty and discipline. Number 3 personality speaks of solid construction. It teaches us to evolve in the tangible and material world, to develop reason and logic and our capacity for effort, accomplishment and work.

This number has the will and effort to carry out the projects well. Number 3 person is honest and very responsible, with a strong sense of order and values. It is the sign of practicality, loyalty, rigidity and repression. It is also the symbol of creation, of fighting against limits, of scientific mentality, attention to detail, capable of achieving important achievements and with ingenuity for the organization. People described with number four have fine administrative skills and respect for the law, order and justice in general. Their legal action provides them with personal authority, the fulfillment of their obligations and the achievement of successes and positions of responsibility in the highest spheres of society.

On the negative side: lack of imagination, concern for detail, stubborn and fixed opinions, argumentative, slow to act, too serious and sometimes confusing.

Number 4 is usually prone to big scenes and terrible discussions, without any restraint. But if he/she has the opportunity to vent his/her anger, in a short time it passes, forgetting the incident and regaining his/her optimistic and ironic temperament. Irony is usually one of the most positive aspects of the personality number 4. Their quick thinking predisposes them to brilliant responses. Their upbeat nature, keen sense of humor and strong personality quickly turn heads.

In number 4 (four) arises the notion of transforming creation, a consequence of number 3 (three), through work. This number teaches us discipline and respect for rules. It also represents our family roots .

Compatibilities of 4 (four):
The 4 is compatible with the 4: equality of approaches, there is a guarantee of success in the relationship.
The 4 is compatible with the 9: it is an alliance of intelligence and thoughts.

In the Tarot, The Emperor, Arcanum number 4, shows us these characteristics of stability, material security, of specific objectives and goals.

The letters D, M and V are the containers of the meaning of the number 4 (four).


This number indicates stability and materialization of desires. We must discover within ourselves which is that divine plan and develop it. Dreaming of this number is a good indication to make an important decision.

Each number, from 1 to 9, has its positive and negative characteristics, its talents, challenges or what it has to overcome to reach its true way of loving and feeling loved and accepted as it really is. It also provides guidelines for self-knowledge. The numerologist Leonardo Apelbaum says that personal numbers only give us general information because each person deserves a complete study to decipher the numbers that block or delay. The matter is not so simple. Let us know if the description matches your personality.

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Interesting facts about the number 4


  • (4) Vesta is asteroid number 4. It was discovered by H. W. M. Olbers from Bremen on 3/29/1807.

Aircrafts and flights

  • 05/26/1991 the Lauda Air plane, flight number 004, Boeing 767-3Z9ER crashed in Phu Toei National Park, Thailand 213 passengers and 10 crew members died.
  • 08/15/1958 the Aeroflot plane, flight number 4, Tupolev Tu-104A crashed in near Chita, Russia 53 passengers and 11 crew members died.
  • 01/15/1966 the Avianca plane, flight number 4, Douglas C-54 crashed in Cartagena Bay, off Cartagena, Colombia 52 passengers and 4 crew members died.

Areas, mountains and surfaces

  • The total area of Madagascar (main island) is 226,658 square miles (587,041 square km). Country Madagascar. 4th largest island in the world.



  • Fingernails grow 4 times faster than toenails.
  • There are 4 embryonic tissues: endoderm, cerebellar mesoderm, cerebral mesoderm, ectoderm.
  • There are 4 types of blood: 0, A, B, AB
  • There are 4 nucleotides in DNA: Thymine, Adenine, Cytosine, and Guanine.

In other fields

  • There are four cardinal points (north, south, east, west).
  • It represents the universal truth.
  • There are 4 seasons of the year: spring, fall, winter and summer.
  • There are 4 types of temperaments of the human being according to psychology: Phlegmatic, Choleric, Sanguineous and Melancholic.
  • There are 4 Earthly Elements and Chakras: Earth, Water, Fire and Air.


  • 4 is the smallest number of colors sufficient to color all planar maps.


  • '4 sekunder' is a song written by Magnus Uggla and Anders Henriksson. '4 Segundo' is a song by Amaia Montero.
  • '4 Seasons of Loneliness', in Spanish '4 seasons of loneliness' is an R&B and pop ballad recorded by the Philadelphia-based vocal quartet, Boyz II Men.
  • 'Mercury4' is an Australian youth band based in Melbourne.
  • '4 Words', in Spanish '4 Palabras', is a song by the Welsh band 'Bullet for My Valentine'.
  • '4 Minutes', in Spanish '4 minutes', is a song by the American singer Avant. It is also the name of the song of the American singer-songwriter Madonna.
  • '4 Peynirli Pizza' is a pop song by the Hepsi group.
  • '4 Real' is a song by Canadian singer-songwriter Avril Lavigne.
  • '4 Years Old', in Spanish '4 years old', is a song by the American singer Chris Brown.
  • '4 Carats', in Spanish '4 carats', is a song by the American artist Kelly Clarkson.
  • '4x4' is a song by the American artist Miley Cyrus with the performance of the American rapper Nelly.
  • '4 Walls', in Spanish '4 Walls', is a song recorded by the South Korean girl group f (x) for their fourth studio album of the same title.
  • '4 Degrees', in Spanish '4 degrees', is a song by the British-American artist Anohni.
  • '4 Wheel Drive' is a song by by American country musician Granger Smith.


  • There are 4 great prophets, Isaiah, Jeremiah, Ezekiel and Daniel.
  • There are 4 horsemen of the apocalypse.
  • There are 4 Angels ready in the 4 corners of the Earth.
  • There are 4 Gospels.
  • There are 4 living beasts in Ezekiel, Daniel, and Revelation.
  • It is the number of pluralism, the paganism of many gods begins here, the Tetragrammaton, the four letters of the name of God.
  • 4 are the seeds of the Parable of the Sower, according to Christ.
  • There are 4 Spiritual Paths of Man, according to Gurdief: The Way of the Fakir, the Way of the Monk, the Way of the Yogi, and the Fourth Way.


  • Beryllium is the chemical element in the periodic table that has the symbol Be and atomic number 4.
  • There are 4 elements in quantum: Strong Nuclear Force, Weak Nuclear Force, Electromagnetism, and Gravitation.
  • There are 4 Brains, according to Medical Neurosciences: The Neurobiotic (or microbiotic brain), the Neuroenteric (or intestinal brain), the Neuroencephalus (or encephalic brain), and the Neurocardium (or cardiac brain).


  • The best athletes to wear number 4
    Lou Gehrig, MLB; Brett Favre, NFL; Bobby Orr, NHL; Mel Ott, MLB; Duke Snider, MLB, Paul Molitor, MLB


  • In hospitals in Japan, using the number 4 as a room number is avoided because its pronunciation "shi" is the same as the word "death."


  • '4 bits' is used in computer architecture to describe integers, memory addresses or other units of data that are up to 4 bits wide, or to refer to a CPU and ALU architecture based on registers, address bus or bus. data of that width.

Number 4 in other languages

How to say or write the number four in Spanish, German, French and other languages.
Spanish: 🔊 (número 4)


German: 🔊 (Anzahl 4)


French: 🔊 (nombre 4)


Portuguese: 🔊 (número 4)


Chinese: 🔊 (数 4)

Other languages ...

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