178 (number)

Short description: Natural number

| <- 177  | 178 |  179 ->

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← 170 171 172 173 174 175 176 177 178 179 →

List of numbers — Integers

← 0 100 200 300 400 500 600 700 800 900 →

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
Binary| 101100102
Ternary| 201213
Quaternary| 23024
Quinary| 12035
Senary| 4546
Octal| 2628
Duodecimal| 12A12
Hexadecimal| B216
Vigesimal| 8I20
Base 36| 4Y36

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

## In mathematics

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

* The year 178 AD or 178 BC
* List of highways numbered 178
* All pages with titles containing 178

## References

1. ↑ Sloane, N. J. A., ed. "Sequence A004115 (Number of unlabeled rooted nonseparable graphs with n nodes)". OEIS Foundation. https://oeis.org/A004115.
2. ↑ Sloane, N. J. A., ed. "Sequence A292623 (Number of median graphs on n nodes)". OEIS Foundation. https://oeis.org/A292623.
3. ↑ Sloane, N. J. A., ed. "Sequence A053018". OEIS Foundation. https://oeis.org/A053018.

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