12656772 has 36 divisors (see below), whose sum is σ = 33877116. Its totient is φ = 3970560.

The previous prime is 12656737. The next prime is 12656783. The reversal of 12656772 is 27765621.

12656772 is a `hidden beast` number, since 1 + 26 + 567 + 72 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5171076 + 7485696 = 2274^2 + 2736^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9729 + ... + 10952.

It is an arithmetic number, because the mean of its divisors is an integer number (941031).

Almost surely, 2^12656772 is an apocalyptic number.

12656772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12656772 is an abundant number, since it is smaller than the sum of its proper divisors (21220344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12656772 is a wasteful number, since it uses less digits than its factorization.

12656772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20708 (or 20703 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 12656772 is about 3557.6357317747. The cubic root of 12656772 is about 233.0456418045.

The spelling of 12656772 in words is "twelve million, six hundred fifty-six thousand, seven hundred seventy-two".