256401794 has 16 divisors (see below), whose sum is σ = 419878080. Its totient is φ = 116459760.

The previous prime is 256401793. The next prime is 256401797. The reversal of 256401794 is 497104652.

It is not an unprimeable number, because it can be changed into a prime (256401793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33227 + ... + 40209.

It is an arithmetic number, because the mean of its divisors is an integer number (26242380).

Almost surely, 2^256401794 is an apocalyptic number.

256401794 is a deficient number, since it is larger than the sum of its proper divisors (163476286).

256401794 is a wasteful number, since it uses less digits than its factorization.

256401794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8665.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 256401794 is about 16012.5511396529. The cubic root of 256401794 is about 635.2924389265.

The spelling of 256401794 in words is "two hundred fifty-six million, four hundred one thousand, seven hundred ninety-four".