257878270 has 32 divisors (see below), whose sum is σ = 529296768. Its totient is φ = 89614848.

The previous prime is 257878259. The next prime is 257878289. The reversal of 257878270 is 72878752.

It is a self number, because there is not a number n which added to its sum of digits gives 257878270.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56134 + ... + 60553.

It is an arithmetic number, because the mean of its divisors is an integer number (16540524).

Almost surely, 2^257878270 is an apocalyptic number.

257878270 is an abundant number, since it is smaller than the sum of its proper divisors (271418498).

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

257878270 is a wasteful number, since it uses less digits than its factorization.

257878270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116724.

The product of its (nonzero) digits is 439040, while the sum is 46.

The square root of 257878270 is about 16058.5886677504. The cubic root of 257878270 is about 636.5095382033.

The spelling of 257878270 in words is "two hundred fifty-seven million, eight hundred seventy-eight thousand, two hundred seventy".