256038684 has 96 divisors (see below), whose sum is σ = 676515840. Its totient is φ = 74692800.

The previous prime is 256038647. The next prime is 256038697. The reversal of 256038684 is 486830652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 448119 + ... + 448689.

It is an arithmetic number, because the mean of its divisors is an integer number (7047040).

Almost surely, 2^256038684 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256038684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (338257920).

256038684 is an abundant number, since it is smaller than the sum of its proper divisors (420477156).

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

256038684 is a wasteful number, since it uses less digits than its factorization.

256038684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711 (or 709 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 42.

The square root of 256038684 is about 16001.2088293354. The cubic root of 256038684 is about 634.9924020006.

The spelling of 256038684 in words is "two hundred fifty-six million, thirty-eight thousand, six hundred eighty-four".