257375620 has 12 divisors (see below), whose sum is σ = 540488844. Its totient is φ = 102950240.

The previous prime is 257375593. The next prime is 257375621. The reversal of 257375620 is 26573752.

It can be written as a sum of positive squares in 2 ways, for example, as 144336196 + 113039424 = 12014^2 + 10632^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 257375620.

It is not an unprimeable number, because it can be changed into a prime (257375621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6434371 + ... + 6434410.

It is an arithmetic number, because the mean of its divisors is an integer number (45040737).

Almost surely, 2^257375620 is an apocalyptic number.

257375620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

257375620 is an abundant number, since it is smaller than the sum of its proper divisors (283113224).

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

257375620 is a wasteful number, since it uses less digits than its factorization.

257375620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12868790 (or 12868788 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 37.

The square root of 257375620 is about 16042.9305302990. The cubic root of 257375620 is about 636.0957129531.

The spelling of 257375620 in words is "two hundred fifty-seven million, three hundred seventy-five thousand, six hundred twenty".