178 (number)

← 177 178 179 →
Cardinalone hundred seventy-eight
Ordinal178th
(one hundred seventy-eighth)
Factorization2 × 89
Divisors1, 2, 89, 178
Greek numeralΡΟΗ´
Roman numeralCLXXVIII
Binary101100102
Ternary201213
Senary4546
Octal2628
Duodecimal12A12
HexadecimalB216

178 (one hundred [and] seventy-eight) is the natural number following 177 and preceding 179.

In mathematics

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There are 178 biconnected graphs with six vertices, among which one is designated as the root and the rest are unlabeled.[1] There are also 178 median graphs on nine vertices.[2]

178 is one of the indexes of the smallest triple of dodecahedral numbers where one is the sum of the other two: the sum of the 46th and the 178th dodecahedral numbers is the 179th.[3]

See also

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References

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  1. ^ Sloane, N. J. A. (ed.). "Sequence A004115 (Number of unlabeled rooted nonseparable graphs with n nodes)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  2. ^ Sloane, N. J. A. (ed.). "Sequence A292623 (Number of median graphs on n nodes)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  3. ^ Sloane, N. J. A. (ed.). "Sequence A053018". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.