256779732 has 24 divisors (see below), whose sum is σ = 653621472. Its totient is φ = 77812000.

The previous prime is 256779709. The next prime is 256779769. The reversal of 256779732 is 237977652.

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, 972519 + ... + 972782.

It is an arithmetic number, because the mean of its divisors is an integer number (27234228).

Almost surely, 2^256779732 is an apocalyptic number.

256779732 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

256779732 is an abundant number, since it is smaller than the sum of its proper divisors (396841740).

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

256779732 is a wasteful number, since it uses less digits than its factorization.

256779732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1945319 (or 1945317 counting only the distinct ones).

The product of its digits is 1111320, while the sum is 48.

The square root of 256779732 is about 16024.3480990647. The cubic root of 256779732 is about 635.6044274872.

The spelling of 256779732 in words is "two hundred fifty-six million, seven hundred seventy-nine thousand, seven hundred thirty-two".