13999724 has 12 divisors (see below), whose sum is σ = 25290048. Its totient is φ = 6774000.

The previous prime is 13999723. The next prime is 13999729. The reversal of 13999724 is 42799931.

It is not an unprimeable number, because it can be changed into a prime (13999723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56327 + ... + 56574.

It is an arithmetic number, because the mean of its divisors is an integer number (2107504).

Almost surely, 2^13999724 is an apocalyptic number.

It is an amenable number.

13999724 is a deficient number, since it is larger than the sum of its proper divisors (11290324).

13999724 is a wasteful number, since it uses less digits than its factorization.

13999724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112936 (or 112934 counting only the distinct ones).

The product of its digits is 122472, while the sum is 44.

The square root of 13999724 is about 3741.6205045408. The cubic root of 13999724 is about 241.0126425993.

The spelling of 13999724 in words is "thirteen million, nine hundred ninety-nine thousand, seven hundred twenty-four".