256435694 has 16 divisors (see below), whose sum is σ = 402236928. Its totient is φ = 122380632.

The previous prime is 256435693. The next prime is 256435747. The reversal of 256435694 is 496534652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256435691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16679 + ... + 28125.

It is an arithmetic number, because the mean of its divisors is an integer number (25139808).

Almost surely, 2^256435694 is an apocalyptic number.

256435694 is a deficient number, since it is larger than the sum of its proper divisors (145801234).

256435694 is a wasteful number, since it uses less digits than its factorization.

256435694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11959.

The product of its digits is 777600, while the sum is 44.

The square root of 256435694 is about 16013.6096492952. The cubic root of 256435694 is about 635.3204359545.

The spelling of 256435694 in words is "two hundred fifty-six million, four hundred thirty-five thousand, six hundred ninety-four".