256644364 has 12 divisors (see below), whose sum is σ = 451257688. Its totient is φ = 127713600.

The previous prime is 256644341. The next prime is 256644389. The reversal of 256644364 is 463446652.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151197 + ... + 152884.

Almost surely, 2^256644364 is an apocalyptic number.

It is an amenable number.

256644364 is a deficient number, since it is larger than the sum of its proper divisors (194613324).

256644364 is a wasteful number, since it uses less digits than its factorization.

256644364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304296 (or 304294 counting only the distinct ones).

The product of its digits is 414720, while the sum is 40.

The square root of 256644364 is about 16020.1237198718. The cubic root of 256644364 is about 635.4927161469.

The spelling of 256644364 in words is "two hundred fifty-six million, six hundred forty-four thousand, three hundred sixty-four".