13397644 has 18 divisors (see below), whose sum is σ = 25389420. Its totient is φ = 6183216.

The previous prime is 13397621. The next prime is 13397647. The reversal of 13397644 is 44679331.

13397644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (13397647) 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, 9234 + ... + 10585.

Almost surely, 2^13397644 is an apocalyptic number.

It is an amenable number.

13397644 is a deficient number, since it is larger than the sum of its proper divisors (11991776).

13397644 is a wasteful number, since it uses less digits than its factorization.

13397644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19849 (or 19834 counting only the distinct ones).

The product of its digits is 54432, while the sum is 37.

The square root of 13397644 is about 3660.2792243216. The cubic root of 13397644 is about 237.5068526185.

It can be divided in two parts, 13397 and 644, that added together give a palindrome (14041).

The spelling of 13397644 in words is "thirteen million, three hundred ninety-seven thousand, six hundred forty-four".