256396 has 12 divisors (see below), whose sum is σ = 512848. Its totient is φ = 109872.

The previous prime is 256393. The next prime is 256423. The reversal of 256396 is 693652.

256396 is an admirable number.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

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 3 ways as a sum of consecutive naturals, for example, 4551 + ... + 4606.

2²⁵⁶³⁹⁶ is an apocalyptic number.

It is an amenable number.

256396 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

256396 is a wasteful number, since it uses less digits than its factorization.

256396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9168 (or 9166 counting only the distinct ones).

The product of its digits is 9720, while the sum is 31.

The square root of 256396 is about 506.3556062690. The cubic root of 256396 is about 63.5287653583.

The spelling of 256396 in words is "two hundred fifty-six thousand, three hundred ninety-six".