256312004 has 24 divisors (see below), whose sum is σ = 483845208. Its totient is φ = 118103040.

The previous prime is 256312003. The next prime is 256312013. The reversal of 256312004 is 400213652.

It can be written as a sum of positive squares in 4 ways, for example, as 16000000 + 240312004 = 4000^2 + 15502^2 .

It is not an unprimeable number, because it can be changed into a prime (256312003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30644 + ... + 38100.

It is an arithmetic number, because the mean of its divisors is an integer number (20160217).

Almost surely, 2^256312004 is an apocalyptic number.

It is an amenable number.

256312004 is a deficient number, since it is larger than the sum of its proper divisors (227533204).

256312004 is a wasteful number, since it uses less digits than its factorization.

256312004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8135 (or 8133 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 256312004 is about 16009.7471560297. The cubic root of 256312004 is about 635.2182720402.

Adding to 256312004 its reverse (400213652), we get a palindrome (656525656).

The spelling of 256312004 in words is "two hundred fifty-six million, three hundred twelve thousand, four".