178 (number)

← 177 178 179 →
← 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
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

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)". 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.