13628644 has 6 divisors (see below), whose sum is σ = 23850134. Its totient is φ = 6814320.

The previous prime is 13628639. The next prime is 13628647. The reversal of 13628644 is 44682631.

It can be written as a sum of positive squares in only one way, i.e., 13616100 + 12544 = 3690^2 + 112^2 .

It is not an unprimeable number, because it can be changed into a prime (13628647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1703577 + ... + 1703584.

Almost surely, 2^13628644 is an apocalyptic number.

It is an amenable number.

13628644 is a deficient number, since it is larger than the sum of its proper divisors (10221490).

13628644 is a wasteful number, since it uses less digits than its factorization.

13628644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3407165 (or 3407163 counting only the distinct ones).

The product of its digits is 27648, while the sum is 34.

The square root of 13628644 is about 3691.6993377034. The cubic root of 13628644 is about 238.8640999537.

The spelling of 13628644 in words is "thirteen million, six hundred twenty-eight thousand, six hundred forty-four".