178 (number)

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

← 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

In mathematicsEdit

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 alsoEdit

ReferencesEdit

  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.