Number 28
Number 28 spell 🔊, write in words: twentyeight . Ordinal number 28th is said 🔊 and write: twentyeighth. The meaning of number 28 in Maths: Is Prime? Factorization and dividers. The square root and cube root of 28. The meaning in computer science, numerology, codes and images, writing and naming in other languages, other interesting facts, news.
Useful information about number 28
The number 28 converted to a Mayan number is  
Decimal and Mayan number conversions. 
Weight conversion
28 kilograms (kg) = 61.7 pounds (lb)
28 pounds (lb) = 12.7 kilograms (kg)
Length conversion
28 kilometers (km) equals to 17.398 miles (mi).
28 miles (mi) equals to 45.062 kilometers (km).
28 meters (m) equals to 45.062 feet (ft).
28 feet (ft) equals 8.535 meters (m).
28 centimeters (cm) equals to 11.0 inches (in).
28 inches (in) equals to 71.1 centimeters (cm).
Temperature conversion
28° Fahrenheit (°F) equals to 2.2° Celsius (°C)
28° Celsius (°C) equals to 82.4° Fahrenheit (°F)
Power conversion
28 Horsepower (hp) equals to 20.59 kilowatts (kW)
28 kilowatts (kW) equals to 38.07 horsepower (hp)
Codes and images of the number 28
Number 28 morse code: .. ..Sign language for number 28:
Images of the number  
Image (1) of the number  Image (2) of the number 
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Number 28 infographic.

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Photo of number 28
Gregorian, Hebrew, Islamic, Persian and Buddhist year (calendar)
Gregorian year 28 is Buddhist year 571.Buddhist year 28 is Gregorian year 515 a. C.
Gregorian year 28 is Islamic year 612 or 611.
Islamic year 28 is Gregorian year 648 or 649.
Gregorian year 28 is Persian year 595 or 594.
Persian year 28 is Gregorian 649 or 650.
Gregorian year 28 is Hebrew year 3788 or 3789.
Hebrew year 28 is Gregorian year 3732 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. 28
Multiplications
Multiplication table of 28
28 multiplied by two equals 56 (28 x 2 = 56).
28 multiplied by three equals 84 (28 x 3 = 84).
28 multiplied by four equals 112 (28 x 4 = 112).
28 multiplied by five equals 140 (28 x 5 = 140).
28 multiplied by seven equals 196 (28 x 7 = 196).
28 multiplied by eight equals 224 (28 x 8 = 224).
28 multiplied by nine equals 252 (28 x 9 = 252).
Fractions: decimal fraction and common fraction
Fraction table of 28
Half of 28 is 14 (28 / 2 = 14).
One third of 28 is 9,3333 (28 / 3 = 9,3333 = 9 1/3).
One quarter of 28 is 7 (28 / 4 = 7).
One fifth of 28 is 5,6 (28 / 5 = 5,6 = 5 3/5).
One seventh of 28 is 4 (28 / 7 = 4).
One eighth of 28 is 3,5 (28 / 8 = 3,5 = 3 1/2).
One ninth of 28 is 3,1111 (28 / 9 = 3,1111 = 3 1/9).
Calculator
28  
Advanced math operations
Is Prime?
The number 28 is not a prime number. The closest prime numbers are 23, 29.
28th prime number in order is 107.
Factorization and dividers
Factorization 2 * 2 * 7 = 28
Divisors of number 28 are 1 , 2 , 4 , 7 , 14 , 28
Total Divisors 6.
Sum of Divisors 56.
Powers
The second power of 28^{2} is 784.
The third power of 28^{3} is 21.952.
Roots
The square root √28 is 5,291503.
The cube root of ^{3}√28 is 3,036589.
Logarithms
The natural logarithm of No. ln 28 = log_{e} 28 = 3,332205.
The logarithm to base 10 of No. log_{10} 28 = 1,447158.
The Napierian logarithm of No. log_{1/e} 28 = 3,332205.
Trigonometric functions
The cosine of 28 is 0,962606.The sine of 28 is 0,270906.
The tangent of 28 is 0,28143.
Properties of the number 28
Is a Friedman number: NoIs a Fibonacci number: No
Is a Bell number: No
Is a palindromic number: No
Is a pentagonal number: No
Is a perfect number: Yes
Number 28 in Computer Science
Code type  Code value 

Unix time  Unix time 28 is equal to Thursday Jan. 1, 1970, 12:28 a.m. GMT 
IPv4, IPv6  Number 28 internet address in dotted format v4 0.0.0.28, v6 ::1c 
28 Decimal  = 11100 Binary 
28 Decimal  = 1001 Ternary 
28 Decimal  = 34 Octal 
28 Decimal  = 1C Hexadecimal (0x1c hex) 
28 BASE64  Mjg= 
28 MD5  33e75ff09dd601bbe69f351039152189 
28 SHA1  0a57cb53ba59c46fc4b692527a38a87c78d84028 
28 SHA224  faf2c49e22e3fdae824e8e5d62956a5f50f16cd4d8f47948b787a582 
28 SHA256  59e19706d51d39f66711c2653cd7eb1291c94d9b55eb14bda74ce4dc636d015a 
28 SHA384  40161b3cdbeffadee863b7e211c444f8e0f99fc051c1666c9fdd8a2aad1354dc1264f346b766064687b0ab6d8c441608 
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Numerology 28
The meaning of the number 8 (eight), numerology 8
Character frequency 8: 1
The meaning of the number 2 (two), numerology 2
Character frequency 2: 1
Interesting facts about the number 28
Asteroids
 (28) Bellona is asteroid number 28. It was discovered by K. T. R. Luther from DüsseldorfBilk Observatory on 3/1/1854.
Areas, mountains and surfaces
 The total area of Alexander Island is 18,950 square miles (49,070 square km). Country None (Antarctic territorial claims by Argentina (partial), Chile and United Kingdom). 28th largest island in the world.
Distances between cities
 There is a 28 miles (45 km) direct distance between Bekasi (Indonesia) and Bogor (Indonesia).
 There is a 18 miles (28 km) direct distance between Delhi (India) and Farīdābād (India).
 There is a 18 miles (28 km) direct distance between Ecatepec (Mexico) and Iztapalapa (Mexico).
 There is a 28 miles (45 km) direct distance between Fukuokashi (Japan) and Kitakyūshū (Japan).
 There is a 18 miles (28 km) direct distance between Klang (Malaysia) and Kuala Lumpur (Malaysia).
 There is a 18 miles (28 km) direct distance between Kobe (Japan) and Sakai (Japan).
 There is a 18 miles (28 km) direct distance between Kowloon (Hong Kong) and Shenzhen (China).
Games
 Pokémon Sandslash (Sandopan, Sandpan) is a Pokémon number # 028 of the National Pokédex. Sandslash is a groundtype Pokémon in the first generation. It is a Field Egg group Pokémon. The indexes ontros of Sandslash are Johto index 049 , Centro Kalos index 098  Pokédex Mountain Area, Teselia index 114 , Hoenn index 113 .
In other fields
 Hate Symbol: 28 is the alphanumeric code of white supremacy for Blood & Honor, an international group of skinheads. The list of evil numbers.
Mathematics
 28 is the 2^{nd} perfect number.
Science
 Nickel is the chemical element in the periodic table that has the symbol Ni and atomic number 28.
Sports
 The best athletes to wear number 28
Marshall Faulk, NFL; Bert Blyleven, MLB; Darrell Green, NFL
Tv, movies and cinematography
 Movie: 28 Days Later Year: 2002 Runtime: 113 Director: Danny Boyle With: Cillian Murphy; Naomie harris
 Movie: 28 Weeks Later ... (28 Weeks Later) Year: 2007 Duration: 99 Director: Juan Carlos Fresnadillo With: Robert Carlyle; Rose byrne
Please write us
If you know something interesting about the number 28 or any natural number (positive integer), please write to us.Number 28 in other languages
Spanish:  🔊 (número 28)  veintiocho 
German:  🔊 (Anzahl 28)  achtundzwanzig 
French:  🔊 (nombre 28)  vingthuit 
Portuguese:  🔊 (número 28)  vinte e oito 
Chinese:  🔊 (数 28)  二十八 
Arabian:  🔊 (عدد 28)  ثمانية و عشرون 
Czech:  🔊 (číslo 28)  dvacet osm 
Korean:  🔊 (번호 28)  이십팔 
Danish:  🔊 (nummer 28)  otteogtyve 
Hebrew:  (מספר 28)  עשרים ושמנה 
Dutch:  🔊 (nummer 28)  achtentwintig 
Japanese:  🔊 (数 28)  二十八 
Indonesian:  🔊 (jumlah 28)  dua puluh delapan 
Italian:  🔊 (numero 28)  ventotto 
Norwegian:  🔊 (nummer 28)  tjueåtte 
Polish:  🔊 (liczba 28)  dwadzieścia osiem 
Russian:  🔊 (номер 28)  двадцать восемь 
Turkish:  🔊 (numara 28)  yirmisekiz 
Thai:  🔊 (จำนวน 28)  ยี่สิบแปด 
Ukrainian:  🔊 (номер 28)  двадцять вiсiм 
Vietnamese:  🔊 (con số 28)  hai mươi tám 
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Number 28 in News
NyTimes: Pfizer Booster Can Be Given After 6 Months, European Drug Agency Says
The E.U.’s main drug regulator also said that extra doses of the Moderna and PfizerBioNTech vaccines can be given to those with underlying health conditions as early as 28 days after the second dose. Oct. 4, 2021 
BBC: Rapper Nines jailed for importing 28kg of cannabis
The British charttopper and another man are both sentenced to 28 months in jail. Oct. 1, 2021 
The Sydney Morning Herald: Several killed in Russian university shooting
A student opened fire at a university in Russia, leaving six people dead and 28 hurt, before being shot by police and detained, officials said. Sept. 21, 2021 
The Sydney Morning Herald: Russian plane with 28 people on board goes missing
Authorities said they had pinpointed an area in the sea where the plane went missing after losing contact with air traffic control in Russia’s far east. July 6, 2021 