256866882 has 8 divisors (see below), whose sum is σ = 513733776. Its totient is φ = 85622292.

The previous prime is 256866881. The next prime is 256866887. The reversal of 256866882 is 288668652.

It is a sphenic number, since it is the product of 3 distinct primes.

256866882 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (256866881) 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, 21405568 + ... + 21405579.

It is an arithmetic number, because the mean of its divisors is an integer number (64216722).

Almost surely, 2^256866882 is an apocalyptic number.

256866882 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

256866882 is a wasteful number, since it uses less digits than its factorization.

256866882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42811152.

The product of its digits is 2211840, while the sum is 51.

The square root of 256866882 is about 16027.0671677634. The cubic root of 256866882 is about 635.6763265424.

The spelling of 256866882 in words is "two hundred fifty-six million, eight hundred sixty-six thousand, eight hundred eighty-two".