256079685 has 32 divisors (see below), whose sum is σ = 428359680. Its totient is φ = 130478400.

The previous prime is 256079639. The next prime is 256079699. The reversal of 256079685 is 586970652.

It is a happy number.

It is not a de Polignac number, because 256079685 - 2⁷ = 256079557 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33250 + ... + 40220.

It is an arithmetic number, because the mean of its divisors is an integer number (13386240).

Almost surely, 2^256079685 is an apocalyptic number.

It is an amenable number.

256079685 is a deficient number, since it is larger than the sum of its proper divisors (172279995).

256079685 is a wasteful number, since it uses less digits than its factorization.

256079685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7089.

The product of its (nonzero) digits is 907200, while the sum is 48.

The square root of 256079685 is about 16002.4899625027. The cubic root of 256079685 is about 635.0262952304.

The spelling of 256079685 in words is "two hundred fifty-six million, seventy-nine thousand, six hundred eighty-five".