257538228 has 24 divisors (see below), whose sum is σ = 602478240. Its totient is φ = 85623840.

The previous prime is 257538163. The next prime is 257538277. The reversal of 257538228 is 822835752.

It is a self number, because there is not a number n which added to its sum of digits gives 257538228.

It is a congruent number.

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, 22918 + ... + 32253.

It is an arithmetic number, because the mean of its divisors is an integer number (25103260).

Almost surely, 2^257538228 is an apocalyptic number.

It is an amenable number.

257538228 is an abundant number, since it is smaller than the sum of its proper divisors (344940012).

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

257538228 is a wasteful number, since it uses less digits than its factorization.

257538228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55567 (or 55565 counting only the distinct ones).

The product of its digits is 268800, while the sum is 42.

The square root of 257538228 is about 16047.9976321035. The cubic root of 257538228 is about 636.2296449294.

The spelling of 257538228 in words is "two hundred fifty-seven million, five hundred thirty-eight thousand, two hundred twenty-eight".