256017264 has 20 divisors (see below), whose sum is σ = 661378056. Its totient is φ = 85339072.

The previous prime is 256017259. The next prime is 256017269. The reversal of 256017264 is 462710652.

It is an interprime number because it is at equal distance from previous prime (256017259) and next prime (256017269).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256017269) 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, 2666799 + ... + 2666894.

Almost surely, 2^256017264 is an apocalyptic number.

256017264 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

256017264 is an abundant number, since it is smaller than the sum of its proper divisors (405360792).

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

256017264 is a wasteful number, since it uses less digits than its factorization.

256017264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5333704 (or 5333698 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 256017264 is about 16000.5394909047. The cubic root of 256017264 is about 634.9746938476.

The spelling of 256017264 in words is "two hundred fifty-six million, seventeen thousand, two hundred sixty-four".