256764018 has 48 divisors (see below), whose sum is σ = 603353664. Its totient is φ = 72626400.

The previous prime is 256763993. The next prime is 256764023. The reversal of 256764018 is 810467652.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25371 + ... + 34017.

It is an arithmetic number, because the mean of its divisors is an integer number (12569868).

Almost surely, 2^256764018 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256764018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (301676832).

256764018 is an abundant number, since it is smaller than the sum of its proper divisors (346589646).

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

256764018 is a wasteful number, since it uses less digits than its factorization.

256764018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8767 (or 8760 counting only the distinct ones).

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

The square root of 256764018 is about 16023.8577752051. The cubic root of 256764018 is about 635.5914616512.

The spelling of 256764018 in words is "two hundred fifty-six million, seven hundred sixty-four thousand, eighteen".