256415244 has 24 divisors (see below), whose sum is σ = 599128320. Its totient is φ = 85353744.

The previous prime is 256415227. The next prime is 256415251. The reversal of 256415244 is 442514652.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5464 + ... + 23295.

It is an arithmetic number, because the mean of its divisors is an integer number (24963680).

Almost surely, 2^256415244 is an apocalyptic number.

It is an amenable number.

256415244 is an abundant number, since it is smaller than the sum of its proper divisors (342713076).

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

256415244 is a wasteful number, since it uses less digits than its factorization.

256415244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29509 (or 29507 counting only the distinct ones).

The product of its digits is 38400, while the sum is 33.

The square root of 256415244 is about 16012.9711171912. The cubic root of 256415244 is about 635.3035471872.

Adding to 256415244 its reverse (442514652), we get a palindrome (698929896).

The spelling of 256415244 in words is "two hundred fifty-six million, four hundred fifteen thousand, two hundred forty-four".