256831270 has 8 divisors (see below), whose sum is σ = 462296304. Its totient is φ = 102732504.

The previous prime is 256831261. The next prime is 256831283. The reversal of 256831270 is 72138652.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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, 12841554 + ... + 12841573.

It is an arithmetic number, because the mean of its divisors is an integer number (57787038).

Almost surely, 2^256831270 is an apocalyptic number.

256831270 is a deficient number, since it is larger than the sum of its proper divisors (205465034).

256831270 is a wasteful number, since it uses less digits than its factorization.

256831270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25683134.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 256831270 is about 16025.9561337226. The cubic root of 256831270 is about 635.6469484829.

The spelling of 256831270 in words is "two hundred fifty-six million, eight hundred thirty-one thousand, two hundred seventy".