13899644 has 24 divisors (see below), whose sum is σ = 26802048. Its totient is φ = 6254640.

The previous prime is 13899637. The next prime is 13899649. The reversal of 13899644 is 44699831.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 13899595 and 13899604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13899649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2999 + ... + 6065.

It is an arithmetic number, because the mean of its divisors is an integer number (1116752).

Almost surely, 2^13899644 is an apocalyptic number.

It is an amenable number.

13899644 is a deficient number, since it is larger than the sum of its proper divisors (12902404).

13899644 is a wasteful number, since it uses less digits than its factorization.

13899644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3185 (or 3183 counting only the distinct ones).

The product of its digits is 186624, while the sum is 44.

The square root of 13899644 is about 3728.2226328373. Note that the first 3 decimals coincide. The cubic root of 13899644 is about 240.4369585934.

The spelling of 13899644 in words is "thirteen million, eight hundred ninety-nine thousand, six hundred forty-four".