257855490 has 48 divisors (see below), whose sum is σ = 709865208. Its totient is φ = 64716288.

The previous prime is 257855483. The next prime is 257855503. The reversal of 257855490 is 94558752.

257855490 is a `hidden beast` number, since 2 + 5 + 7 + 8 + 554 + 90 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 192682161 + 65173329 = 13881^2 + 8073^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82737 + ... + 85796.

Almost surely, 2^257855490 is an apocalyptic number.

257855490 is an abundant number, since it is smaller than the sum of its proper divisors (452009718).

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

257855490 is a wasteful number, since it uses less digits than its factorization.

257855490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168563 (or 168560 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 45.

The square root of 257855490 is about 16057.8793743134. The cubic root of 257855490 is about 636.4907953623.

The spelling of 257855490 in words is "two hundred fifty-seven million, eight hundred fifty-five thousand, four hundred ninety".