256844416 has 32 divisors (see below), whose sum is σ = 529334100. Its totient is φ = 123992064.

The previous prime is 256844411. The next prime is 256844437. The reversal of 256844416 is 614448652.

It can be written as a sum of positive squares in 2 ways, for example, as 252682816 + 4161600 = 15896^2 + 2040^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (256844411) 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, 30885 + ... + 38308.

Almost surely, 2^256844416 is an apocalyptic number.

It is an amenable number.

256844416 is an abundant number, since it is smaller than the sum of its proper divisors (272489684).

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

256844416 is an equidigital number, since it uses as much as digits as its factorization.

256844416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69236 (or 69224 counting only the distinct ones).

The product of its digits is 184320, while the sum is 40.

The square root of 256844416 is about 16026.3662756097. The cubic root of 256844416 is about 635.6577935697.

The spelling of 256844416 in words is "two hundred fifty-six million, eight hundred forty-four thousand, four hundred sixteen".