257425644 has 24 divisors (see below), whose sum is σ = 686468608. Its totient is φ = 73550160.

The previous prime is 257425607. The next prime is 257425711. The reversal of 257425644 is 446524752.

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, 1532212 + ... + 1532379.

Almost surely, 2^257425644 is an apocalyptic number.

It is an amenable number.

257425644 is an abundant number, since it is smaller than the sum of its proper divisors (429042964).

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

257425644 is a wasteful number, since it uses less digits than its factorization.

257425644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3064605 (or 3064603 counting only the distinct ones).

The product of its digits is 268800, while the sum is 39.

The square root of 257425644 is about 16044.4895213279. The cubic root of 257425644 is about 636.1369211952.

The spelling of 257425644 in words is "two hundred fifty-seven million, four hundred twenty-five thousand, six hundred forty-four".