257385892 has 12 divisors (see below), whose sum is σ = 450634716. Its totient is φ = 128633120.

The previous prime is 257385889. The next prime is 257385923. The reversal of 257385892 is 298583752.

It can be written as a sum of positive squares in 2 ways, for example, as 197571136 + 59814756 = 14056^2 + 7734^2 .

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, 4459 + ... + 23122.

It is an arithmetic number, because the mean of its divisors is an integer number (37552893).

Almost surely, 2^257385892 is an apocalyptic number.

It is an amenable number.

257385892 is a deficient number, since it is larger than the sum of its proper divisors (193248824).

257385892 is a wasteful number, since it uses less digits than its factorization.

257385892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29918 (or 29916 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 49.

The square root of 257385892 is about 16043.2506681159. The cubic root of 257385892 is about 636.1041751483.

The spelling of 257385892 in words is "two hundred fifty-seven million, three hundred eighty-five thousand, eight hundred ninety-two".