257635490 has 16 divisors (see below), whose sum is σ = 529993152. Its totient is φ = 88332144.

The previous prime is 257635481. The next prime is 257635501. The reversal of 257635490 is 94536752.

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, 1840184 + ... + 1840323.

It is an arithmetic number, because the mean of its divisors is an integer number (33124572).

Almost surely, 2^257635490 is an apocalyptic number.

257635490 is an abundant number, since it is smaller than the sum of its proper divisors (272357662).

257635490 is a wasteful number, since it uses less digits than its factorization.

257635490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3680521.

The product of its (nonzero) digits is 226800, while the sum is 41.

The square root of 257635490 is about 16051.0276929547. The cubic root of 257635490 is about 636.3097277710.

The spelling of 257635490 in words is "two hundred fifty-seven million, six hundred thirty-five thousand, four hundred ninety".