12628779 has 8 divisors (see below), whose sum is σ = 17249232. Its totient is φ = 8213760.

The previous prime is 12628757. The next prime is 12628783. The reversal of 12628779 is 97782621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12628779 - 2⁵ = 12628747 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12628779.

It is not an unprimeable number, because it can be changed into a prime (12628709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51214 + ... + 51459.

It is an arithmetic number, because the mean of its divisors is an integer number (2156154).

Almost surely, 2^12628779 is an apocalyptic number.

12628779 is a deficient number, since it is larger than the sum of its proper divisors (4620453).

12628779 is a wasteful number, since it uses less digits than its factorization.

12628779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102717.

The product of its digits is 84672, while the sum is 42.

The square root of 12628779 is about 3553.6993401243. The cubic root of 12628779 is about 232.8737058632.

The spelling of 12628779 in words is "twelve million, six hundred twenty-eight thousand, seven hundred seventy-nine".