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290 (two hundred [and] ninety) is the natural number following 289 and preceding 291.
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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 |
In mathematics edit
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.
Integers from 291 to 299 edit
291 edit
292 edit
293 edit
294 edit
295 edit
296 edit
297 edit
298 edit
299 edit
References edit
- ^ "Sloane's A005282 : Mian-Chowla sequence". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-28.