257883426 has 20 divisors (see below), whose sum is σ = 577850262. Its totient is φ = 85961088.

The previous prime is 257883419. The next prime is 257883433. The reversal of 257883426 is 624388752.

It is an interprime number because it is at equal distance from previous prime (257883419) and next prime (257883433).

It can be written as a sum of positive squares in only one way, i.e., 167728401 + 90155025 = 12951^2 + 9495^2 .

It is a super-2 number, since 2×257883426² = 133007722810994952, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 795775 + ... + 796098.

Almost surely, 2^257883426 is an apocalyptic number.

257883426 is an abundant number, since it is smaller than the sum of its proper divisors (319966836).

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

257883426 is a wasteful number, since it uses less digits than its factorization.

257883426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1591887 (or 1591878 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 257883426 is about 16058.7492040943. The cubic root of 257883426 is about 636.5137802840.

The spelling of 257883426 in words is "two hundred fifty-seven million, eight hundred eighty-three thousand, four hundred twenty-six".