# 82 (number)

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82 (number)

82 (eighty-two) is the natural number following 81 and preceding 83.

82
Cardinal eighty-second
Ordinal 82nd
(eighty-second)
Numeral system 82
Factorization $2 \cdot 41$
Divisors 1, 2, 41, 82
Roman numeral LXXXII
Binary 10100102
Octal 1228
Duodecimal 6A12

## In mathematics

Eighty-two is the twenty-third biprime and the twelfth of the form (2.q). The aliquot sum of 82 is 44 within the aliquot sequence (82,44,40,50,43,1,0)) 82 being the eighth composite number in the 43-aliquot tree.

Eighty-two is a companion Pell number.

Eighty-two is a happy number

## In other fields

Eighty-two is also:

• The atomic number of lead.
• In physics, the sixth Magic Number.
• The model number of: Mark 82 bomb, a nonguided general purpose bomb.
• The number of the French department Tarn-et-Garonne.
• The code for international direct dial phone calls to South Korea.
• The ISBN Group Identifier for books published in Norway.
• Title of Dennis Smith's book about firefighters: Report from Engine Co. 82.
• The year AD 82, 82 BC, or 1982.
• The sophomore studio album of Kenyan house trio Just A Band.
• The number of Trip Murphy's (Matt Dillon) car in Herbie Fully Loaded (2005).
• The number (*82) to unblock your caller ID for phones that block anonymous incoming calls.
• The very significant number that appears at the end of Kurt Vonnegut's book "Hocus Pocus".

## In sports

• Both the NBA and NHL operate 82-game regular seasons.

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