| Number: | 290 |
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.
See main article: 291 (number).
See main article: 292 (number).
See main article: 293 (number).
See main article: 294 (number).
See main article: 295 (number).
See main article: 296 (number).
See main article: 297 (number).
See main article: 298 (number).
See main article: 299 (number).