256305404 has 12 divisors (see below), whose sum is σ = 453574800. Its totient is φ = 126712608.

The previous prime is 256305373. The next prime is 256305443. The reversal of 256305404 is 404503652.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359624 + ... + 360335.

It is an arithmetic number, because the mean of its divisors is an integer number (37797900).

Almost surely, 2^256305404 is an apocalyptic number.

It is an amenable number.

256305404 is a deficient number, since it is larger than the sum of its proper divisors (197269396).

256305404 is a wasteful number, since it uses less digits than its factorization.

256305404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720052 (or 720050 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 256305404 is about 16009.5410302732. The cubic root of 256305404 is about 635.2128197315.

The spelling of 256305404 in words is "two hundred fifty-six million, three hundred five thousand, four hundred four".