257628004 has 6 divisors (see below), whose sum is σ = 450849014. Its totient is φ = 128814000.

The previous prime is 257627999. The next prime is 257628017. The reversal of 257628004 is 400826752.

It can be written as a sum of positive squares in only one way, i.e., 139948900 + 117679104 = 11830^2 + 10848^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32203497 + ... + 32203504.

Almost surely, 2^257628004 is an apocalyptic number.

It is an amenable number.

257628004 is a deficient number, since it is larger than the sum of its proper divisors (193221010).

257628004 is a wasteful number, since it uses less digits than its factorization.

257628004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64407005 (or 64407003 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 257628004 is about 16050.7944974696. The cubic root of 257628004 is about 636.3035647216.

The spelling of 257628004 in words is "two hundred fifty-seven million, six hundred twenty-eight thousand, four".