256804835 has 24 divisors (see below), whose sum is σ = 360402336. Its totient is φ = 175150080.

The previous prime is 256804819. The next prime is 256804843. The reversal of 256804835 is 538408652.

It is not a de Polignac number, because 256804835 - 2⁴ = 256804819 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256804792 and 256804801.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44570 + ... + 50000.

It is an arithmetic number, because the mean of its divisors is an integer number (15016764).

Almost surely, 2^256804835 is an apocalyptic number.

256804835 is a deficient number, since it is larger than the sum of its proper divisors (103597501).

256804835 is a wasteful number, since it uses less digits than its factorization.

256804835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5643 (or 5636 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 41.

The square root of 256804835 is about 16025.1313567159. The cubic root of 256804835 is about 635.6251392180.

The spelling of 256804835 in words is "two hundred fifty-six million, eight hundred four thousand, eight hundred thirty-five".