256886494 has 32 divisors (see below), whose sum is σ = 413973504. Its totient is φ = 119280480.

The previous prime is 256886459. The next prime is 256886501. The reversal of 256886494 is 494688652.

256886494 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×256886494² = 131981341599224072, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 232347 + ... + 233449.

It is an arithmetic number, because the mean of its divisors is an integer number (12936672).

Almost surely, 2^256886494 is an apocalyptic number.

256886494 is a deficient number, since it is larger than the sum of its proper divisors (157087010).

256886494 is a wasteful number, since it uses less digits than its factorization.

256886494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1272.

The product of its digits is 3317760, while the sum is 52.

The square root of 256886494 is about 16027.6789960368. The cubic root of 256886494 is about 635.6925042693.

The spelling of 256886494 in words is "two hundred fifty-six million, eight hundred eighty-six thousand, four hundred ninety-four".