256018764 has 24 divisors (see below), whose sum is σ = 602860720. Its totient is φ = 84556224.

The previous prime is 256018747. The next prime is 256018781. The reversal of 256018764 is 467810652.

It is an interprime number because it is at equal distance from previous prime (256018747) and next prime (256018781).

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, 96559 + ... + 99174.

Almost surely, 2^256018764 is an apocalyptic number.

It is an amenable number.

256018764 is an abundant number, since it is smaller than the sum of its proper divisors (346841956).

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

256018764 is a wasteful number, since it uses less digits than its factorization.

256018764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195849 (or 195847 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 256018764 is about 16000.5863642555. The cubic root of 256018764 is about 634.9759339465.

The spelling of 256018764 in words is "two hundred fifty-six million, eighteen thousand, seven hundred sixty-four".