13998664 has 8 divisors (see below), whose sum is σ = 26247510. Its totient is φ = 6999328.

The previous prime is 13998659. The next prime is 13998679. The reversal of 13998664 is 46689931.

It can be written as a sum of positive squares in only one way, i.e., 11276164 + 2722500 = 3358^2 + 1650^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 874909 + ... + 874924.

Almost surely, 2^13998664 is an apocalyptic number.

It is an amenable number.

13998664 is a deficient number, since it is larger than the sum of its proper divisors (12248846).

13998664 is a wasteful number, since it uses less digits than its factorization.

13998664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1749839 (or 1749835 counting only the distinct ones).

The product of its digits is 279936, while the sum is 46.

The square root of 13998664 is about 3741.4788520049. The cubic root of 13998664 is about 241.0065596259.

The spelling of 13998664 in words is "thirteen million, nine hundred ninety-eight thousand, six hundred sixty-four".