84 (number)

From Wikipedia, the free encyclopedia
Jump to: navigation, search
← 83 84 85 →
Cardinal eighty-four
Ordinal 84th
(eighty-fourth)
Factorization 22× 3 × 7
Divisors 1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84
Greek numeral ΠΔ´
Roman numeral LXXXIV
Binary 10101002
Ternary 100103
Quaternary 11104
Quinary 3145
Senary 2206
Octal 1248
Duodecimal 7012
Hexadecimal 5416
Vigesimal 4420
Base 36 2C36

84 (eighty-four) is the natural number following 83 and preceding 85.

In mathematics[edit]

A hepteract is a seven-dimensional hypercube with 84 penteract 5-faces

84 is:

A hepteract is a seven-dimensional hypercube with 84 penteract 5-faces.

In astronomy[edit]

In other fields[edit]

Eighty-four is also:

See also[edit]

References[edit]

  1. ^ "Sloane's A000292 : Tetrahedral numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-29. 
  2. ^ Bede (731). Ecclesiastical History of the English People. , 2.2, Latin original. See Easter controversy#Synod of Whitby in 664 and Computus.