82 (number)
(Redirected from Eighty-two)
| ||||
|---|---|---|---|---|
| Cardinal | eighty-two | |||
| Ordinal | 82nd (eighty-second) | |||
| Factorization | 2 × 41 | |||
| Divisors | 1, 2, 41, 82 | |||
| Greek numeral | ΠΒ´ | |||
| Roman numeral | LXXXII, lxxxii | |||
| Binary | 10100102 | |||
| Ternary | 100013 | |||
| Senary | 2146 | |||
| Octal | 1228 | |||
| Duodecimal | 6A12 | |||
| Hexadecimal | 5216 | |||
82 (eighty-two) is the natural number following 81 and preceding 83.
In mathematics
[edit]82 is:
- the twenty-seventh semiprime[1] and the thirteenth of the form (2.q).
- with an aliquot sum of 44, within an aliquot sequence of four composite numbers (82,44,40,50,43,1,0) to the Prime in the 43-aliquot tree.
- a companion Pell number.[2]
- a happy number.[3]
- palindromic in bases 3 (100013), 9 (1019) and 40 (2240).
In science
[edit]- The atomic number of lead.
- The sixth magic number.
- Messier 82, a starburst galaxy in the constellation Ursa Major.
- The New General Catalogue object NGC 82, a single star in the constellation Andromeda.
In sports
[edit]- 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
[edit]- ^ Sloane, N. J. A. (ed.). "Sequence A001358". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- ^ "Sloane's A002203 : Companion Pell numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-29.
- ^ "Sloane's A007770 : Happy numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-29.