257898402 has 24 divisors (see below), whose sum is σ = 583075584. Its totient is φ = 82228344.

The previous prime is 257898397. The next prime is 257898409. The reversal of 257898402 is 204898752.

It is not an unprimeable number, because it can be changed into a prime (257898409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 311058 + ... + 311885.

It is an arithmetic number, because the mean of its divisors is an integer number (24294816).

Almost surely, 2^257898402 is an apocalyptic number.

257898402 is an abundant number, since it is smaller than the sum of its proper divisors (325177182).

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

257898402 is a wasteful number, since it uses less digits than its factorization.

257898402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622974 (or 622971 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The square root of 257898402 is about 16059.2154851973. The cubic root of 257898402 is about 636.5261014143.

It can be divided in two parts, 25789 and 8402, that added together give a triangular number (34191 = T₂₆₁).

The spelling of 257898402 in words is "two hundred fifty-seven million, eight hundred ninety-eight thousand, four hundred two".