256392 has 32 divisors (see below), whose sum is σ = 712800. Its totient is φ = 85392.

The previous prime is 256391. The next prime is 256393. The reversal of 256392 is 293652.

256392 is a `hidden beast` number, since 25 + 639 + 2 = 666.

256392 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (256391) and next prime (256393).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 256392.

It is not an unprimeable number, because it can be changed into a prime (256391) 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, 378 + ... + 809.

It is an arithmetic number, because the mean of its divisors is an integer number (22275).

2²⁵⁶³⁹² is an apocalyptic number.

It is an amenable number.

256392 is an abundant number, since it is smaller than the sum of its proper divisors (456408).

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

256392 is a wasteful number, since it uses less digits than its factorization.

256392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1202 (or 1192 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 256392 is about 506.3516564602. The cubic root of 256392 is about 63.5284349886.

The spelling of 256392 in words is "two hundred fifty-six thousand, three hundred ninety-two".