256790394 has 24 divisors (see below), whose sum is σ = 635862240. Its totient is φ = 73368648.

The previous prime is 256790341. The next prime is 256790399. The reversal of 256790394 is 493097652.

It is a happy number.

256790394 is a `hidden beast` number, since 256 + 7 + 9 + 0 + 394 = 666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (256790399) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1018884 + ... + 1019135.

It is an arithmetic number, because the mean of its divisors is an integer number (26494260).

Almost surely, 2^256790394 is an apocalyptic number.

256790394 is an abundant number, since it is smaller than the sum of its proper divisors (379071846).

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

256790394 is a wasteful number, since it uses less digits than its factorization.

256790394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2038034 (or 2038031 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The square root of 256790394 is about 16024.6807768517. The cubic root of 256790394 is about 635.6132245479.

The spelling of 256790394 in words is "two hundred fifty-six million, seven hundred ninety thousand, three hundred ninety-four".