256601328 has 20 divisors (see below), whose sum is σ = 662886888. Its totient is φ = 85533760.

The previous prime is 256601321. The next prime is 256601377. The reversal of 256601328 is 823106652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256601321) 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, 2672883 + ... + 2672978.

Almost surely, 2^256601328 is an apocalyptic number.

It is an amenable number.

256601328 is an abundant number, since it is smaller than the sum of its proper divisors (406285560).

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

256601328 is a wasteful number, since it uses less digits than its factorization.

256601328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5345872 (or 5345866 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 256601328 is about 16018.7804779265. The cubic root of 256601328 is about 635.4571928091.

The spelling of 256601328 in words is "two hundred fifty-six million, six hundred one thousand, three hundred twenty-eight".