178 (one hundred
ndseventy-eight) is the
natural number
In mathematics, the natural numbers are those numbers used for counting (as in "there are ''six'' coins on the table") and ordering (as in "this is the ''third'' largest city in the country").
Numbers used for counting are called ''cardinal ...
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. There are also 178
median graph
In graph theory, a division of mathematics, a median graph is an undirected graph in which every three vertices ''a'', ''b'', and ''c'' have a unique ''median'': a vertex ''m''(''a'',''b'',''c'') that belongs to shortest paths between each pair o ...
s on nine vertices.
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.
See also
* The year
178 AD or
178 BC
*
List of highways numbered 178
*
References
{{DEFAULTSORT:178 (Number)
Integers