256185328 has 40 divisors (see below), whose sum is σ = 578856800. Its totient is φ = 109791360.

The previous prime is 256185313. The next prime is 256185329. The reversal of 256185328 is 823581652.

256185328 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256185329) 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, 17853 + ... + 28828.

It is an arithmetic number, because the mean of its divisors is an integer number (14471420).

Almost surely, 2^256185328 is an apocalyptic number.

256185328 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

256185328 is an abundant number, since it is smaller than the sum of its proper divisors (322671472).

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

256185328 is an equidigital number, since it uses as much as digits as its factorization.

256185328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46710 (or 46690 counting only the distinct ones).

The product of its digits is 115200, while the sum is 40.

The square root of 256185328 is about 16005.7904522082. The cubic root of 256185328 is about 635.1136077138.

The spelling of 256185328 in words is "two hundred fifty-six million, one hundred eighty-five thousand, three hundred twenty-eight".