190 (number)
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{{Infobox number | number } 190 (one hundred [and] ninety) is the natural number following 189 and preceding 191.
In mathematics
[edit]190 is a triangular number, a hexagonal number, and a centered nonagonal number, the fourth figurate number (after 1, 28, and 91) with that combination of properties.[1] It is also a truncated square pyramid number.[2]
In other fields
[edit]- 190 is the telephonic number of the 27 Brazilian Military Polices.
See also
[edit]
Wikimedia Commons has media related to 190 (number).
References
[edit]- ^ Sloane, N. J. A. (ed.), "Sequence A272399 (The intersection of hexagonal numbers (A000384) and centered 9-gonal numbers (A060544))", The On-Line Encyclopedia of Integer Sequences, OEIS Foundation
- ^ Sloane, N. J. A. (ed.), "Sequence A050409 (Truncated square pyramid numbers: a(n) = Sum_{k = n..2*n} k^2)", The On-Line Encyclopedia of Integer Sequences, OEIS Foundation