256644024 has 64 divisors (see below), whose sum is σ = 789680640. Its totient is φ = 67685760.

The previous prime is 256643993. The next prime is 256644029. The reversal of 256644024 is 420446652.

256644024 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256644029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56572 + ... + 60939.

It is an arithmetic number, because the mean of its divisors is an integer number (12338760).

Almost surely, 2^256644024 is an apocalyptic number.

256644024 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

256644024 is an abundant number, since it is smaller than the sum of its proper divisors (533036616).

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

256644024 is a wasteful number, since it uses less digits than its factorization.

256644024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117540 (or 117536 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 33.

The square root of 256644024 is about 16020.1131082149. The cubic root of 256644024 is about 635.4924355153.

The spelling of 256644024 in words is "two hundred fifty-six million, six hundred forty-four thousand, twenty-four".