256328304 has 80 divisors (see below), whose sum is σ = 687292320. Its totient is φ = 82252800.

The previous prime is 256328279. The next prime is 256328333. The reversal of 256328304 is 403823652.

It is a happy number.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 178662 + ... + 180090.

It is an arithmetic number, because the mean of its divisors is an integer number (8591154).

Almost surely, 2^256328304 is an apocalyptic number.

256328304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256328304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (343646160).

256328304 is an abundant number, since it is smaller than the sum of its proper divisors (430964016).

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

256328304 is a wasteful number, since it uses less digits than its factorization.

256328304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1578 (or 1572 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 256328304 is about 16010.2562128156. The cubic root of 256328304 is about 635.2317371897.

The spelling of 256328304 in words is "two hundred fifty-six million, three hundred twenty-eight thousand, three hundred four".