290 (number)
Appearance
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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.
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.