13899924 has 30 divisors (see below), whose sum is σ = 36337994. Its totient is φ = 4633200.

The previous prime is 13899917. The next prime is 13899929. The reversal of 13899924 is 42999831.

It can be written as a sum of positive squares in only one way, i.e., 13089924 + 810000 = 3618^2 + 900^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13899924.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13899929) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 21127 + ... + 21774.

Almost surely, 2^13899924 is an apocalyptic number.

It is an amenable number.

13899924 is an abundant number, since it is smaller than the sum of its proper divisors (22438070).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13899924 is a wasteful number, since it uses less digits than its factorization.

13899924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42917 (or 42906 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 13899924 is about 3728.2601840537. The cubic root of 13899924 is about 240.4385730687.

The spelling of 13899924 in words is "thirteen million, eight hundred ninety-nine thousand, nine hundred twenty-four".