13990668 has 12 divisors (see below), whose sum is σ = 32644920. Its totient is φ = 4663552.

The previous prime is 13990667. The next prime is 13990687. The reversal of 13990668 is 86609931.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (13990667) 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 3 ways as a sum of consecutive naturals, for example, 582933 + ... + 582956.

It is an arithmetic number, because the mean of its divisors is an integer number (2720410).

Almost surely, 2^13990668 is an apocalyptic number.

It is an amenable number.

13990668 is an abundant number, since it is smaller than the sum of its proper divisors (18654252).

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

13990668 is a wasteful number, since it uses less digits than its factorization.

13990668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1165896 (or 1165894 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 13990668 is about 3740.4101379394. The cubic root of 13990668 is about 240.9606634488.

The spelling of 13990668 in words is "thirteen million, nine hundred ninety thousand, six hundred sixty-eight".