257628260 has 24 divisors (see below), whose sum is σ = 542794560. Its totient is φ = 102713184.

The previous prime is 257628247. The next prime is 257628271. The reversal of 257628260 is 62826752.

257628260 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 14840 + ... + 27119.

It is an arithmetic number, because the mean of its divisors is an integer number (22616440).

Almost surely, 2^257628260 is an apocalyptic number.

257628260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

257628260 is an abundant number, since it is smaller than the sum of its proper divisors (285166300).

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

257628260 is a wasteful number, since it uses less digits than its factorization.

257628260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42275 (or 42273 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 257628260 is about 16050.8024721507. The cubic root of 257628260 is about 636.3037754824.

The spelling of 257628260 in words is "two hundred fifty-seven million, six hundred twenty-eight thousand, two hundred sixty".