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Merged from https://en.wikipedia.org/w/index.php?title=198_(number)&oldid=1075492964 - see Wikipedia:Articles for deletion/198 (number).
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* [[List of highways numbered 190]]
* [[List of highways numbered 190]]
* {{In title|190}}
* {{In title|190}}

==Integers from 191 to 199==

===191===
{{Main|191 (number)}}

===192===
{{Main|192 (number)}}

===193===
{{Main|193 (number)}}

===194===
{{Main|194 (number)}}

===195===
{{Main|195 (number)}}

===196===
{{Main|196 (number)}}

===197===
{{Main|197 (number)}}

===198===
{{Main|198 (number)}}
198 = 2·3<sup>2</sup>·11. It is a [[Harshad number]],<ref>{{Cite web |title=A005349 - OEIS |url=https://oeis.org/A005349 |access-date=6 March 2022 |website=oeis.org}}</ref> a [[self number]],<ref>{{Cite web |title=A003052 - OEIS |url=https://oeis.org/A003052 |access-date=6 March 2022 |website=oeis.org}}</ref> and a [[companion Pell number]].<ref>{{Cite web |title=A002203 - OEIS |url=https://oeis.org/A002203 |access-date=6 March 2022 |website=oeis.org}}</ref>

===199===
{{Main|199 (number)}}


==External links==
==External links==

Revision as of 12:06, 10 March 2022

← 189 190 191 →
Cardinalone hundred ninety
Ordinal190th
(one hundred ninetieth)
Factorization2 × 5 × 19
Greek numeralΡϞ´
Roman numeralCXC
Binary101111102
Ternary210013
Senary5146
Octal2768
Duodecimal13A12
HexadecimalBE16

190 (one hundred [and] ninety) is the natural number following 189 and preceding 191.

In mathematics

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]

See also

Integers from 191 to 199

191

Main article: 191 (number)

192

Main article: 192 (number)

193

Main article: 193 (number)

194

Main article: 194 (number)

195

Main article: 195 (number)

196

Main article: 196 (number)

197

Main article: 197 (number)

198

Main article: 198 (number)

198 = 2·32·11. It is a Harshad number,[3] a self number,[4] and a companion Pell number.[5]

199

Main article: 199 (number)

External links

Wikimedia Commons has media related to 190 (number).

References

  1. ^ 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
  2. ^ 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
  3. ^ "A005349 - OEIS". oeis.org. Retrieved 6 March 2022.
  4. ^ "A003052 - OEIS". oeis.org. Retrieved 6 March 2022.
  5. ^ "A002203 - OEIS". oeis.org. Retrieved 6 March 2022.
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