12628649 has 6 divisors (see below), whose sum is σ = 13881210. Its totient is φ = 11480480.

The previous prime is 12628613. The next prime is 12628657. The reversal of 12628649 is 94682621.

It can be written as a sum of positive squares in only one way, i.e., 11854249 + 774400 = 3443^2 + 880^2 .

It is not a de Polignac number, because 12628649 - 2⁸ = 12628393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12628669) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 52064 + ... + 52305.

It is an arithmetic number, because the mean of its divisors is an integer number (2313535).

Almost surely, 2^12628649 is an apocalyptic number.

It is an amenable number.

12628649 is a deficient number, since it is larger than the sum of its proper divisors (1252561).

12628649 is a wasteful number, since it uses less digits than its factorization.

12628649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104391 (or 104380 counting only the distinct ones).

The product of its digits is 41472, while the sum is 38.

The square root of 12628649 is about 3553.6810492783. The cubic root of 12628649 is about 232.8729067971.

The spelling of 12628649 in words is "twelve million, six hundred twenty-eight thousand, six hundred forty-nine".