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|---|---|---|---|---|
| Cardinal | two hundred ninety | |||
| Ordinal | 290th (two hundred ninetieth) | |||
| Factorization | 2 × 5 × 29 | |||
| Greek numeral | ΣϞ´ | |||
| Roman numeral | CCXC | |||
| Binary | 1001000102 | |||
| Ternary | 1012023 | |||
| Senary | 12026 | |||
| Octal | 4428 | |||
| Duodecimal | 20212 | |||
| Hexadecimal | 12216 | |||
290 (two hundred [and] ninety) is the natural number following 289 and preceding 291.
The product of three primes, 290 is a sphenic number, and the sum of four consecutive primes (67 + 71 + 73 + 79). The sum of the squares of the divisors of 17 is 290.
Not only is it a nontotient and a noncototient, it is also an untouchable number.
290 is the 16th member of the Mian–Chowla sequence; it can not be obtained as the sum of any two previous terms in the sequence.[1]
See also the Bhargava–Hanke 290 theorem.
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Main article: 291 (number) |
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Main article: 292 (number) |
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Main article: 293 (number) |
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Main article: 294 (number) |
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Main article: 295 (number) |
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Main article: 296 (number) |
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Main article: 297 (number) |
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Main article: 298 (number) |
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Main article: 299 (number) |