256879930 has 8 divisors (see below), whose sum is σ = 462383892. Its totient is φ = 102751968.

The previous prime is 256879927. The next prime is 256879933. The reversal of 256879930 is 39978652.

256879930 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (256879927) and next prime (256879933).

It can be written as a sum of positive squares in 2 ways, for example, as 256416169 + 463761 = 16013^2 + 681^2 .

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

It is not an unprimeable number, because it can be changed into a prime (256879933) 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, 12843987 + ... + 12844006.

Almost surely, 2^256879930 is an apocalyptic number.

256879930 is a deficient number, since it is larger than the sum of its proper divisors (205503962).

256879930 is a wasteful number, since it uses less digits than its factorization.

256879930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25688000.

The product of its (nonzero) digits is 816480, while the sum is 49.

The square root of 256879930 is about 16027.4742239693. The cubic root of 256879930 is about 635.6870897883.

The spelling of 256879930 in words is "two hundred fifty-six million, eight hundred seventy-nine thousand, nine hundred thirty".