256694384 has 40 divisors (see below), whose sum is σ = 519966720. Its totient is φ = 122616000.

The previous prime is 256694359. The next prime is 256694387. The reversal of 256694384 is 483496652.

256694384 is digitally balanced in base 2 and base 3, because in such bases 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 (256694387) 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, 35909 + ... + 42459.

It is an arithmetic number, because the mean of its divisors is an integer number (12999168).

Almost surely, 2^256694384 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 256694384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259983360).

256694384 is an abundant number, since it is smaller than the sum of its proper divisors (263272336).

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

256694384 is a wasteful number, since it uses less digits than its factorization.

256694384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6669 (or 6663 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 47.

The square root of 256694384 is about 16021.6848052881. The cubic root of 256694384 is about 635.5339993196.

The spelling of 256694384 in words is "two hundred fifty-six million, six hundred ninety-four thousand, three hundred eighty-four".