256940934 has 16 divisors (see below), whose sum is σ = 515341872. Its totient is φ = 85403648.

The previous prime is 256940921. The next prime is 256940969. The reversal of 256940934 is 439049652.

256940934 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58539 + ... + 62774.

It is an arithmetic number, because the mean of its divisors is an integer number (32208867).

Almost surely, 2^256940934 is an apocalyptic number.

256940934 is an abundant number, since it is smaller than the sum of its proper divisors (258400938).

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

256940934 is a wasteful number, since it uses less digits than its factorization.

256940934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121671.

The product of its (nonzero) digits is 233280, while the sum is 42.

The square root of 256940934 is about 16029.3772180955. The cubic root of 256940934 is about 635.7374069226.

The spelling of 256940934 in words is "two hundred fifty-six million, nine hundred forty thousand, nine hundred thirty-four".