256576 has 28 divisors (see below), whose sum is σ = 538480. Its totient is φ = 120960.

The previous prime is 256567. The next prime is 256577. The reversal of 256576 is 675652.

256576 is a modest number, since divided by 576 gives 256 as remainder.

It is a nialpdrome in base 4 and base 8.

It is not an unprimeable number, because it can be changed into a prime (256577) 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, 1111 + ... + 1321.

2²⁵⁶⁵⁷⁶ 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 256576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (269240).

256576 is an abundant number, since it is smaller than the sum of its proper divisors (281904).

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

256576 is a wasteful number, since it uses less digits than its factorization.

256576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242 (or 232 counting only the distinct ones).

The product of its digits is 12600, while the sum is 31.

The square root of 256576 is about 506.5333157849. The cubic root of 256576 is about 63.5436284383.

It can be divided in two parts, 256 and 576, that multiplied together give a square (147456 = 384²).

The spelling of 256576 in words is "two hundred fifty-six thousand, five hundred seventy-six".