257898056 has 24 divisors (see below), whose sum is σ = 523619730. Its totient is φ = 119029248.

The previous prime is 257898049. The next prime is 257898079. The reversal of 257898056 is 650898752.

It can be written as a sum of positive squares in 3 ways, for example, as 177795556 + 80102500 = 13334^2 + 8950^2 .

It is a super-2 number, since 2×257898056² = 133022814577158272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 257897995 and 257898013.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 94025 + ... + 96728.

Almost surely, 2^257898056 is an apocalyptic number.

257898056 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

257898056 is an abundant number, since it is smaller than the sum of its proper divisors (265721674).

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

257898056 is a wasteful number, since it uses less digits than its factorization.

257898056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190785 (or 190768 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 50.

The square root of 257898056 is about 16059.2047125628. The cubic root of 257898056 is about 636.5258167568.

The spelling of 257898056 in words is "two hundred fifty-seven million, eight hundred ninety-eight thousand, fifty-six".