84 (number)

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← 83 84 85 →
Cardinaleighty-four
Ordinal84th
(eighty-fourth)
Factorization22× 3 × 7
Divisors1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84
Greek numeralΠΔ´
Roman numeralLXXXIV
Binary10101002
Ternary100103
Quaternary11104
Quinary3145
Senary2206
Octal1248
Duodecimal7012
Hexadecimal5416
Vigesimal4420
Base 362C36

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.