256486404 has 12 divisors (see below), whose sum is σ = 598468304. Its totient is φ = 85495464.

The previous prime is 256486387. The next prime is 256486421. The reversal of 256486404 is 404684652.

It is an interprime number because it is at equal distance from previous prime (256486387) and next prime (256486421).

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10686922 + ... + 10686945.

Almost surely, 2^256486404 is an apocalyptic number.

It is an amenable number.

256486404 is an abundant number, since it is smaller than the sum of its proper divisors (341981900).

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

256486404 is a wasteful number, since it uses less digits than its factorization.

256486404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21373874 (or 21373872 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 39.

The square root of 256486404 is about 16015.1929117323. The cubic root of 256486404 is about 635.3623112688.

The spelling of 256486404 in words is "two hundred fifty-six million, four hundred eighty-six thousand, four hundred four".