256680772 has 12 divisors (see below), whose sum is σ = 450132480. Its totient is φ = 128071496.

The previous prime is 256680763. The next prime is 256680791. The reversal of 256680772 is 277086652.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65068 + ... + 68899.

It is an arithmetic number, because the mean of its divisors is an integer number (37511040).

Almost surely, 2^256680772 is an apocalyptic number.

It is an amenable number.

256680772 is a deficient number, since it is larger than the sum of its proper divisors (193451708).

256680772 is a wasteful number, since it uses less digits than its factorization.

256680772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134450 (or 134448 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 43.

The square root of 256680772 is about 16021.2600003870. The cubic root of 256680772 is about 635.5227654136.

It can be divided in two parts, 2566 and 80772, that added together give a palindrome (83338).

The spelling of 256680772 in words is "two hundred fifty-six million, six hundred eighty thousand, seven hundred seventy-two".