257624428 has 12 divisors (see below), whose sum is σ = 451274320. Its totient is φ = 128688912.

The previous prime is 257624417. The next prime is 257624431. The reversal of 257624428 is 824426752.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26043 + ... + 34546.

Almost surely, 2^257624428 is an apocalyptic number.

It is an amenable number.

257624428 is a deficient number, since it is larger than the sum of its proper divisors (193649892).

257624428 is a wasteful number, since it uses less digits than its factorization.

257624428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61656 (or 61654 counting only the distinct ones).

The product of its digits is 215040, while the sum is 40.

The square root of 257624428 is about 16050.6831007281. The cubic root of 257624428 is about 636.3006206420.

The spelling of 257624428 in words is "two hundred fifty-seven million, six hundred twenty-four thousand, four hundred twenty-eight".