256407942 has 16 divisors (see below), whose sum is σ = 586075392. Its totient is φ = 73259400.

The previous prime is 256407941. The next prime is 256407953. The reversal of 256407942 is 249704652.

256407942 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 256407942.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256407941) 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, 3052434 + ... + 3052517.

It is an arithmetic number, because the mean of its divisors is an integer number (36629712).

Almost surely, 2^256407942 is an apocalyptic number.

256407942 is an abundant number, since it is smaller than the sum of its proper divisors (329667450).

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

256407942 is a wasteful number, since it uses less digits than its factorization.

256407942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6104963.

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 256407942 is about 16012.7431129085. The cubic root of 256407942 is about 635.2975165648.

The spelling of 256407942 in words is "two hundred fifty-six million, four hundred seven thousand, nine hundred forty-two".