# 82 (number)

 ← 81 82 83 →
Cardinal eighty-two
Ordinal 82nd
(eighty-second)
Factorization 2 × 41
Divisors 1, 2, 41, 82
Roman numeral LXXXII
Binary 10100102
Ternary 100013
Quaternary 11024
Quinary 3125
Senary 2146
Octal 1228
Duodecimal 6A12
Vigesimal 4220
Base 36 2A36

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

## In mathematics

82 is:

• the twenty-third biprime and the twelfth of the form (2.q).
• a companion Pell number.[1]
• a happy number.[2]
• palindromic in bases 3 (100013), 9 (1019) and 40 (2240).
• a Harshad number in bases 3 and 9
• the eighth composite number in the 43-aliquot tree.

The aliquot sum of 82 is 44 within the aliquot sequence (82,44,40,50,43,1,0).

## In other fields

Eighty-two is also:

## In sports

• Both the NBA and NHL operate 82-game regular seasons.
• In Major League Baseball, the number of games a team must win to secure a winning season.

## References

1. "Sloane's A002203 : Companion Pell numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-29.
2. "Sloane's A007770 : Happy numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-29.