12722728 has 32 divisors (see below), whose sum is σ = 24494400. Its totient is φ = 6193792.

The previous prime is 12722707. The next prime is 12722729. The reversal of 12722728 is 82722721.

It is a self number, because there is not a number n which added to its sum of digits gives 12722728.

It is not an unprimeable number, because it can be changed into a prime (12722729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76101 + ... + 76267.

It is an arithmetic number, because the mean of its divisors is an integer number (765450).

Almost surely, 2^12722728 is an apocalyptic number.

It is an amenable number.

12722728 is a deficient number, since it is larger than the sum of its proper divisors (11771672).

12722728 is a wasteful number, since it uses less digits than its factorization.

12722728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369 (or 365 counting only the distinct ones).

The product of its digits is 6272, while the sum is 31.

The square root of 12722728 is about 3566.8933261313. The cubic root of 12722728 is about 233.4497505230.

The spelling of 12722728 in words is "twelve million, seven hundred twenty-two thousand, seven hundred twenty-eight".