256885884 has 48 divisors (see below), whose sum is σ = 676935840. Its totient is φ = 84222720.

The previous prime is 256885883. The next prime is 256885897. The reversal of 256885884 is 488588652.

It is a happy number.

256885884 is a `hidden beast` number, since 2 + 56 + 8 + 8 + 588 + 4 = 666.

It is a super-2 number, since 2×256885884² = 131980714796922912, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 256885884.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256885883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12909 + ... + 26084.

It is an arithmetic number, because the mean of its divisors is an integer number (14102830).

Almost surely, 2^256885884 is an apocalyptic number.

It is an amenable number.

256885884 is an abundant number, since it is smaller than the sum of its proper divisors (420049956).

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

256885884 is a wasteful number, since it uses less digits than its factorization.

256885884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39067 (or 39059 counting only the distinct ones).

The product of its digits is 4915200, while the sum is 54.

The square root of 256885884 is about 16027.6599664455. The cubic root of 256885884 is about 635.6920010993.

The spelling of 256885884 in words is "two hundred fifty-six million, eight hundred eighty-five thousand, eight hundred eighty-four".