156 (number)

← 155 156 157 →
Cardinalone hundred fifty-six
Ordinal156th
(one hundred fifty-sixth)
Factorization22 × 3 × 13
Divisors1, 2, 3, 4, 6, 12, 13, 26, 39, 52, 78, 156
Greek numeralΡΝϚ´
Roman numeralCLVI, clvi
Binary100111002
Ternary122103
Senary4206
Octal2348
Duodecimal11012
Hexadecimal9C16

156 (one hundred [and] fifty-six) is the natural number, following 155 and preceding 157.

In mathematics

156 is an abundant number, a pronic number, a dodecagonal number, and a refactorable number.

156 is the number of graphs on 6 unlabeled nodes.

156 is a repdigit in base 5 (1111), and also in bases 25, 38, 51, 77, and 155.

156 degrees is the internal angle of a pentadecagon.

References

  1. ^ "Sloane's A051624 : 12-gonal (or dodecagonal) numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-28.
  2. ^ "Sloane's A000088 : Number of graphs with n nodes". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2021-12-19.
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