256704788 has 24 divisors (see below), whose sum is σ = 461661312. Its totient is φ = 124835904.

The previous prime is 256704787. The next prime is 256704793. The reversal of 256704788 is 887407652.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256704787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26456 + ... + 34832.

It is an arithmetic number, because the mean of its divisors is an integer number (19235888).

Almost surely, 2^256704788 is an apocalyptic number.

It is an amenable number.

256704788 is a deficient number, since it is larger than the sum of its proper divisors (204956524).

256704788 is a wasteful number, since it uses less digits than its factorization.

256704788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8591 (or 8589 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 47.

The square root of 256704788 is about 16022.0094869526. The cubic root of 256704788 is about 635.5425854137.

The spelling of 256704788 in words is "two hundred fifty-six million, seven hundred four thousand, seven hundred eighty-eight".