256747876 has 24 divisors (see below), whose sum is σ = 560177856. Its totient is φ = 100031520.

The previous prime is 256747871. The next prime is 256747877. The reversal of 256747876 is 678747652.

It is a super-2 number, since 2×256747876² = 131838943661022752, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (256747871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 416491 + ... + 417106.

It is an arithmetic number, because the mean of its divisors is an integer number (23340744).

Almost surely, 2^256747876 is an apocalyptic number.

It is an amenable number.

256747876 is an abundant number, since it is smaller than the sum of its proper divisors (303429980).

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

256747876 is a wasteful number, since it uses less digits than its factorization.

256747876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833619 (or 833617 counting only the distinct ones).

The product of its digits is 3951360, while the sum is 52.

The square root of 256747876 is about 16023.3540808409. The cubic root of 256747876 is about 635.5781421156.

The spelling of 256747876 in words is "two hundred fifty-six million, seven hundred forty-seven thousand, eight hundred seventy-six".