257970256 has 40 divisors (see below), whose sum is σ = 506385000. Its totient is φ = 127303680.

The previous prime is 257970241. The next prime is 257970269. The reversal of 257970256 is 652079752.

257970256 is nontrivially palindromic in base 15.

It can be written as a sum of positive squares in 4 ways, for example, as 32490000 + 225480256 = 5700^2 + 15016^2 .

It is a congruent number.

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, 574320 + ... + 574768.

It is an arithmetic number, because the mean of its divisors is an integer number (12659625).

Almost surely, 2^257970256 is an apocalyptic number.

It is an amenable number.

257970256 is a deficient number, since it is larger than the sum of its proper divisors (248414744).

257970256 is a wasteful number, since it uses less digits than its factorization.

257970256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847 (or 841 counting only the distinct ones).

The product of its (nonzero) digits is 264600, while the sum is 43.

The square root of 257970256 is about 16061.4524872441. The cubic root of 257970256 is about 636.5852108661.

The spelling of 257970256 in words is "two hundred fifty-seven million, nine hundred seventy thousand, two hundred fifty-six".