257572890 has 24 divisors (see below), whose sum is σ = 669689748. Its totient is φ = 68686080.

The previous prime is 257572871. The next prime is 257572897. The reversal of 257572890 is 98275752.

It is a happy number.

257572890 is a `hidden beast` number, since 2 + 575 + 72 + 8 + 9 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 252523881 + 5049009 = 15891^2 + 2247^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (257572897) 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, 1430871 + ... + 1431050.

Almost surely, 2^257572890 is an apocalyptic number.

257572890 is an abundant number, since it is smaller than the sum of its proper divisors (412116858).

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

257572890 is a wasteful number, since it uses less digits than its factorization.

257572890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2861934 (or 2861931 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 45.

The square root of 257572890 is about 16049.0775435849. The cubic root of 257572890 is about 636.2581869739.

The spelling of 257572890 in words is "two hundred fifty-seven million, five hundred seventy-two thousand, eight hundred ninety".