257632880 has 20 divisors (see below), whose sum is σ = 598996632. Its totient is φ = 103053120.

The previous prime is 257632877. The next prime is 257632891. The reversal of 257632880 is 88236752.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1610126 + ... + 1610285.

Almost surely, 2^257632880 is an apocalyptic number.

257632880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

257632880 is an abundant number, since it is smaller than the sum of its proper divisors (341363752).

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

257632880 is a wasteful number, since it uses less digits than its factorization.

257632880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3220424 (or 3220418 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 257632880 is about 16050.9463895435. The cubic root of 257632880 is about 636.3075790324.

The spelling of 257632880 in words is "two hundred fifty-seven million, six hundred thirty-two thousand, eight hundred eighty".