| ||||
|---|---|---|---|---|
| Cardinal | one hundred ninety | |||
| Ordinal | 190th (one hundred ninetieth) | |||
| Factorization | 2 × 5 × 19 | |||
| Greek numeral | ΡϞ´ | |||
| Roman numeral | CXC | |||
| Binary | 101111102 | |||
| Ternary | 210013 | |||
| Senary | 5146 | |||
| Octal | 2768 | |||
| Duodecimal | 13A12 | |||
| Hexadecimal | BE16 | |||
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]
Integers from 191 to 199
- 191
- 191 is a prime number.
- 192
- 192 = 26 × 3 is a 3-smooth number, the smallest number with 14 divisors.
- 193
- 193 is a prime number.
- 194
- 194 = 2 × 97 is a Markov number, the smallest number written as the sum of three squares in five ways, and the number of irreducible representations of the Monster group.
- 195
- 195 = 3 × 5 × 13 is the smallest number expressed as a sum of distinct squares in 16 different ways.
- 196
- 196 = 22 × 72 is a square number.
- 197
- 197 is a prime number and a Schröder–Hipparchus number.
- 198
- 198 = 2 × 32 × 11 is the smallest number written as the sum of four squares in ten ways.
- No integer factorial ever ends in exactly 198 zeroes in base 10 or in base 12.[3][4]
- There are 198 ridges on a U.S. dollar coin.[5]
- 199
- 199 is a prime number and a centered triangular number.
In other fields
- 190 is the telephonic number of the 27 Brazilian Military Polices.
See also
Wikimedia Commons has media related to 190 (number).
References
- ↑ 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
- ↑ "A000966 - OEIS". oeis.org. Retrieved 2022-08-24.
- ↑ "A136772 - OEIS". oeis.org. Retrieved 2022-08-24.
- ↑ "Why Do Coins Have Ridges? | Mental Floss". 2022-08-18. Archived from the original on 2022-08-18. Retrieved 2022-08-24.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.