256712636 has 12 divisors (see below), whose sum is σ = 449777328. Its totient is φ = 128204832.

The previous prime is 256712627. The next prime is 256712639. The reversal of 256712636 is 636217652.

256712636 is digitally balanced in base 3, 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 256712636.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256712639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34016 + ... + 40871.

It is an arithmetic number, because the mean of its divisors is an integer number (37481444).

Almost surely, 2^256712636 is an apocalyptic number.

It is an amenable number.

256712636 is a deficient number, since it is larger than the sum of its proper divisors (193064692).

256712636 is a wasteful number, since it uses less digits than its factorization.

256712636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75748 (or 75746 counting only the distinct ones).

The product of its digits is 90720, while the sum is 38.

The square root of 256712636 is about 16022.2543981801. The cubic root of 256712636 is about 635.5490619678.

The spelling of 256712636 in words is "two hundred fifty-six million, seven hundred twelve thousand, six hundred thirty-six".