257271620 has 24 divisors (see below), whose sum is σ = 545056344. Its totient is φ = 101997056.

The previous prime is 257271617. The next prime is 257271631. The reversal of 257271620 is 26172752.

It can be written as a sum of positive squares in 4 ways, for example, as 7441984 + 249829636 = 2728^2 + 15806^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54659 + ... + 59178.

It is an arithmetic number, because the mean of its divisors is an integer number (22710681).

Almost surely, 2^257271620 is an apocalyptic number.

257271620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

257271620 is an abundant number, since it is smaller than the sum of its proper divisors (287784724).

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

257271620 is a wasteful number, since it uses less digits than its factorization.

257271620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113959 (or 113957 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 257271620 is about 16039.6888997262. The cubic root of 257271620 is about 636.0100238390.

The spelling of 257271620 in words is "two hundred fifty-seven million, two hundred seventy-one thousand, six hundred twenty".