257402992 has 40 divisors (see below), whose sum is σ = 621781632. Its totient is φ = 100286400.

The previous prime is 257402987. The next prime is 257403019. The reversal of 257402992 is 299204752.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

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, 103234 + ... + 105697.

Almost surely, 2^257402992 is an apocalyptic number.

257402992 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

257402992 is an abundant number, since it is smaller than the sum of its proper divisors (364378640).

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

257402992 is a wasteful number, since it uses less digits than its factorization.

257402992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208957 (or 208951 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 257402992 is about 16043.7835936540. The cubic root of 257402992 is about 636.1182618315.

The spelling of 257402992 in words is "two hundred fifty-seven million, four hundred two thousand, nine hundred ninety-two".