257370020 has 12 divisors (see below), whose sum is σ = 540477084. Its totient is φ = 102948000.

The previous prime is 257370013. The next prime is 257370031. The reversal of 257370020 is 20073752.

It can be written as a sum of positive squares in 2 ways, for example, as 70829056 + 186540964 = 8416^2 + 13658^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6434231 + ... + 6434270.

It is an arithmetic number, because the mean of its divisors is an integer number (45039757).

Almost surely, 2^257370020 is an apocalyptic number.

257370020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

257370020 is an abundant number, since it is smaller than the sum of its proper divisors (283107064).

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

257370020 is a wasteful number, since it uses less digits than its factorization.

257370020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12868510 (or 12868508 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 26.

The square root of 257370020 is about 16042.7559976458. The cubic root of 257370020 is about 636.0910995119.

The spelling of 257370020 in words is "two hundred fifty-seven million, three hundred seventy thousand, twenty".