257928512 has 14 divisors (see below), whose sum is σ = 511827018. Its totient is φ = 128964224.

The previous prime is 257928511. The next prime is 257928533. The reversal of 257928512 is 215829752.

It can be written as a sum of positive squares in only one way, i.e., 250398976 + 7529536 = 15824^2 + 2744^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 257928512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257928511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2015003 + ... + 2015130.

Almost surely, 2^257928512 is an apocalyptic number.

It is an amenable number.

257928512 is a deficient number, since it is larger than the sum of its proper divisors (253898506).

257928512 is an equidigital number, since it uses as much as digits as its factorization.

257928512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4030145 (or 4030135 counting only the distinct ones).

The product of its digits is 100800, while the sum is 41.

The square root of 257928512 is about 16060.1529257974. The cubic root of 257928512 is about 636.5508722219.

The spelling of 257928512 in words is "two hundred fifty-seven million, nine hundred twenty-eight thousand, five hundred twelve".