256804874 has 8 divisors (see below), whose sum is σ = 405481440. Its totient is φ = 121644396.

The previous prime is 256804871. The next prime is 256804879. The reversal of 256804874 is 478408652.

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

It is not an unprimeable number, because it can be changed into a prime (256804871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3378974 + ... + 3379049.

It is an arithmetic number, because the mean of its divisors is an integer number (50685180).

Almost surely, 2^256804874 is an apocalyptic number.

256804874 is a deficient number, since it is larger than the sum of its proper divisors (148676566).

256804874 is a wasteful number, since it uses less digits than its factorization.

256804874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6758044.

The product of its (nonzero) digits is 430080, while the sum is 44.

The square root of 256804874 is about 16025.1325735546. The cubic root of 256804874 is about 635.6251713947.

The spelling of 256804874 in words is "two hundred fifty-six million, eight hundred four thousand, eight hundred seventy-four".