256802636 has 48 divisors (see below), whose sum is σ = 488570880. Its totient is φ = 117754560.

The previous prime is 256802617. The next prime is 256802671. The reversal of 256802636 is 636208652.

It is a self number, because there is not a number n which added to its sum of digits gives 256802636.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 361850 + ... + 362558.

It is an arithmetic number, because the mean of its divisors is an integer number (10178560).

Almost surely, 2^256802636 is an apocalyptic number.

It is an amenable number.

256802636 is a deficient number, since it is larger than the sum of its proper divisors (231768244).

256802636 is a wasteful number, since it uses less digits than its factorization.

256802636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894 (or 892 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 38.

The square root of 256802636 is about 16025.0627455870. The cubic root of 256802636 is about 635.6233249431.

The spelling of 256802636 in words is "two hundred fifty-six million, eight hundred two thousand, six hundred thirty-six".