256646376 has 96 divisors (see below), whose sum is σ = 836222400. Its totient is φ = 69465600.

The previous prime is 256646371. The next prime is 256646389. The reversal of 256646376 is 673646652.

256646376 is a `hidden beast` number, since 2 + 5 + 6 + 6 + 4 + 637 + 6 = 666.

256646376 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (256646371) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3825 + ... + 22976.

It is an arithmetic number, because the mean of its divisors is an integer number (8710650).

Almost surely, 2^256646376 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 256646376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (418111200).

256646376 is an abundant number, since it is smaller than the sum of its proper divisors (579576024).

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

256646376 is a wasteful number, since it uses less digits than its factorization.

256646376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26839 (or 26832 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 45.

The square root of 256646376 is about 16020.1865157682. The cubic root of 256646376 is about 635.4943768211.

The spelling of 256646376 in words is "two hundred fifty-six million, six hundred forty-six thousand, three hundred seventy-six".