257503660 has 36 divisors (see below), whose sum is σ = 547954848. Its totient is φ = 101648352.

The previous prime is 257503643. The next prime is 257503667. The reversal of 257503660 is 66305752.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (257503667) 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, 123789 + ... + 125851.

It is an arithmetic number, because the mean of its divisors is an integer number (15220968).

Almost surely, 2^257503660 is an apocalyptic number.

257503660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

257503660 is an abundant number, since it is smaller than the sum of its proper divisors (290451188).

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

257503660 is a wasteful number, since it uses less digits than its factorization.

257503660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2230 (or 2149 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 34.

The square root of 257503660 is about 16046.9205768584. The cubic root of 257503660 is about 636.2011777375.

The spelling of 257503660 in words is "two hundred fifty-seven million, five hundred three thousand, six hundred sixty".