23251290 has 16 divisors (see below), whose sum is σ = 55803168. Its totient is φ = 6200336.

The previous prime is 23251279. The next prime is 23251313. The reversal of 23251290 is 9215232.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 23251290.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 387492 + ... + 387551.

It is an arithmetic number, because the mean of its divisors is an integer number (3487698).

Almost surely, 2^23251290 is an apocalyptic number.

23251290 is an abundant number, since it is smaller than the sum of its proper divisors (32551878).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23251290 is a wasteful number, since it uses less digits than its factorization.

23251290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775053.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 23251290 is about 4821.9591454097. The cubic root of 23251290 is about 285.4186521846.

The spelling of 23251290 in words is "twenty-three million, two hundred fifty-one thousand, two hundred ninety".