256404274 has 16 divisors (see below), whose sum is σ = 441266688. Its totient is φ = 109458432.

The previous prime is 256404263. The next prime is 256404277. The reversal of 256404274 is 472404652.

256404274 = 147² + 148² + ... + 917².

256404274 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (256404277) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32034 + ... + 39229.

It is an arithmetic number, because the mean of its divisors is an integer number (27579168).

Almost surely, 2^256404274 is an apocalyptic number.

256404274 is a deficient number, since it is larger than the sum of its proper divisors (184862414).

256404274 is a wasteful number, since it uses less digits than its factorization.

256404274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71529.

The product of its (nonzero) digits is 53760, while the sum is 34.

The square root of 256404274 is about 16012.6285787187. The cubic root of 256404274 is about 635.2944871703.

The spelling of 256404274 in words is "two hundred fifty-six million, four hundred four thousand, two hundred seventy-four".