257830286238 has 48 divisors (see below), whose sum is σ = 639804147840. Its totient is φ = 73508036688.

The previous prime is 257830286177. The next prime is 257830286243. The reversal of 257830286238 is 832682038752.

257830286238 is a `hidden beast` number, since 2 + 5 + 7 + 8 + 3 + 0 + 2 + 8 + 623 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2132028 + ... + 2249711.

It is an arithmetic number, because the mean of its divisors is an integer number (13329253080).

Almost surely, 2^257830286238 is an apocalyptic number.

257830286238 is an abundant number, since it is smaller than the sum of its proper divisors (381973861602).

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

257830286238 is a wasteful number, since it uses less digits than its factorization.

257830286238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4382221 (or 4382218 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 54.

The spelling of 257830286238 in words is "two hundred fifty-seven billion, eight hundred thirty million, two hundred eighty-six thousand, two hundred thirty-eight".