257670260 has 24 divisors (see below), whose sum is σ = 542756256. Its totient is φ = 102754080.

The previous prime is 257670251. The next prime is 257670293. The reversal of 257670260 is 62076752.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 257670260.

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, 12842 + ... + 26081.

It is an arithmetic number, because the mean of its divisors is an integer number (22614844).

Almost surely, 2^257670260 is an apocalyptic number.

257670260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

257670260 is an abundant number, since it is smaller than the sum of its proper divisors (285085996).

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

257670260 is a wasteful number, since it uses less digits than its factorization.

257670260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39263 (or 39261 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 35.

The square root of 257670260 is about 16052.1107646315. The cubic root of 257670260 is about 636.3383515371.

The spelling of 257670260 in words is "two hundred fifty-seven million, six hundred seventy thousand, two hundred sixty".