256445944 has 16 divisors (see below), whose sum is σ = 483788520. Its totient is φ = 127435680.

The previous prime is 256445941. The next prime is 256445951. The reversal of 256445944 is 449544652.

It is a super-2 number, since 2×256445944² = 131529044388102272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 256445944.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256445941) 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, 97027 + ... + 99634.

Almost surely, 2^256445944 is an apocalyptic number.

It is an amenable number.

256445944 is a deficient number, since it is larger than the sum of its proper divisors (227342576).

256445944 is a wasteful number, since it uses less digits than its factorization.

256445944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196830 (or 196826 counting only the distinct ones).

The product of its digits is 691200, while the sum is 43.

The square root of 256445944 is about 16013.9296863699. The cubic root of 256445944 is about 635.3289006467.

The spelling of 256445944 in words is "two hundred fifty-six million, four hundred forty-five thousand, nine hundred forty-four".