256512004 has 12 divisors (see below), whose sum is σ = 513024064. Its totient is φ = 109933704.

The previous prime is 256511987. The next prime is 256512007. The reversal of 256512004 is 400215652.

256512004 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 256512004.

It is not an unprimeable number, because it can be changed into a prime (256512007) 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, 4580544 + ... + 4580599.

Almost surely, 2^256512004 is an apocalyptic number.

It is an amenable number.

256512004 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

256512004 is a wasteful number, since it uses less digits than its factorization.

256512004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9161154 (or 9161152 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 256512004 is about 16015.9921328652. The cubic root of 256512004 is about 635.3834491457.

Adding to 256512004 its reverse (400215652), we get a palindrome (656727656).

The spelling of 256512004 in words is "two hundred fifty-six million, five hundred twelve thousand, four".