256849930 has 16 divisors (see below), whose sum is σ = 474825960. Its totient is φ = 99963072.

The previous prime is 256849919. The next prime is 256849949. The reversal of 256849930 is 39948652.

256849930 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 210569121 + 46280809 = 14511^2 + 6803^2 .

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, 346725 + ... + 347464.

Almost surely, 2^256849930 is an apocalyptic number.

256849930 is a deficient number, since it is larger than the sum of its proper divisors (217976030).

256849930 is a wasteful number, since it uses less digits than its factorization.

256849930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694233.

The product of its (nonzero) digits is 466560, while the sum is 46.

The square root of 256849930 is about 16026.5383037011. The cubic root of 256849930 is about 635.6623423572.

The spelling of 256849930 in words is "two hundred fifty-six million, eight hundred forty-nine thousand, nine hundred thirty".