13999916 has 24 divisors (see below), whose sum is σ = 29218560. Its totient is φ = 5738832.

The previous prime is 13999889. The next prime is 13999919. The reversal of 13999916 is 61999931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13999919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10226 + ... + 11513.

It is an arithmetic number, because the mean of its divisors is an integer number (1217440).

Almost surely, 2^13999916 is an apocalyptic number.

It is an amenable number.

13999916 is an abundant number, since it is smaller than the sum of its proper divisors (15218644).

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

13999916 is a wasteful number, since it uses less digits than its factorization.

13999916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21773 (or 21771 counting only the distinct ones).

The product of its digits is 118098, while the sum is 47.

The square root of 13999916 is about 3741.6461617849. The cubic root of 13999916 is about 241.0137443881.

The spelling of 13999916 in words is "thirteen million, nine hundred ninety-nine thousand, nine hundred sixteen".