85 (number)

85 (eighty-five) is the natural number following 84 and preceding 86.

84 85 86
Cardinal eighty-five
Ordinal 85th
(eighty-fifth)
Factorization 5 × 17
Divisors 1, 5, 17, 85
Roman numeral LXXXV
Binary 10101012
Ternary 100113
Quaternary 11114
Quinary 3205
Senary 2216
Octal 1258
Duodecimal 7112
Hexadecimal 5516
Vigesimal 4520
Base 36 2D36

In mathematics

85 is:

The aliquot sum of 85 is 23 within the aliquot sequence (23,1,0), 85 being the second composite number in the 23-aliquot tree.

In astronomy

In titles and names

In sports

In U.S. college athletics, schools that are members of NCAA Division I are limited to providing athletic scholarships to a maximum of 85 football players in a given season. The specifics vary by the two Division I football subdivisions:

In other fields

In military technology

See also

References

  1. "Sloane's A005900 : Octahedral numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-29.
  2. "Sloane's A005448 : Centered triangular numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-29.
  3. "Sloane's A001844 : Centered square numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-29.
  4. "Sloane's A001107 : 10-gonal (or decagonal) numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-29.
  5. "Sloane's A007692". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.. Note that the two smaller numbers on this list, 50 and 65, have 1 as one of the squares in their representations as sums of two squares.
  6. "Sloane's A006753 : Smith numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-29.

External links

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