256975772 has 6 divisors (see below), whose sum is σ = 449707608. Its totient is φ = 128487884.

The previous prime is 256975769. The next prime is 256975781. The reversal of 256975772 is 277579652.

256975772 is digitally balanced in base 2, 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 256975772.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32121968 + ... + 32121975.

It is an arithmetic number, because the mean of its divisors is an integer number (74951268).

Almost surely, 2^256975772 is an apocalyptic number.

It is an amenable number.

256975772 is a deficient number, since it is larger than the sum of its proper divisors (192731836).

256975772 is a wasteful number, since it uses less digits than its factorization.

256975772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64243947 (or 64243945 counting only the distinct ones).

The product of its digits is 1852200, while the sum is 50.

The square root of 256975772 is about 16030.4638735128. The cubic root of 256975772 is about 635.7661383234.

The spelling of 256975772 in words is "two hundred fifty-six million, nine hundred seventy-five thousand, seven hundred seventy-two".