178 (number)
| ||||
|---|---|---|---|---|
| Cardinal | one hundred seventy-eight | |||
| Ordinal | 178th (one hundred seventy-eighth) | |||
| Factorization | 2 × 89 | |||
| Divisors | 1, 2, 89, 178 | |||
| Greek numeral | ΡΟΗ´ | |||
| Roman numeral | CLXXVIII, clxxviii | |||
| Binary | 101100102 | |||
| Ternary | 201213 | |||
| Senary | 4546 | |||
| Octal | 2628 | |||
| Duodecimal | 12A12 | |||
| Hexadecimal | B216 | |||
178 (one hundred [and] seventy-eight) is the natural number following 177 and preceding 179.
In mathematics
[edit]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
[edit]References
[edit]- ^ 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.
- ^ Sloane, N. J. A. (ed.). "Sequence A292623 (Number of median graphs on n nodes)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- ^ Sloane, N. J. A. (ed.). "Sequence A053018". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
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