13669988 has 12 divisors (see below), whose sum is σ = 23970492. Its totient is φ = 6821280.

The previous prime is 13669979. The next prime is 13669993. The reversal of 13669988 is 88996631.

It can be written as a sum of positive squares in 2 ways, for example, as 6390784 + 7279204 = 2528^2 + 2698^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 995 + ... + 5322.

It is an arithmetic number, because the mean of its divisors is an integer number (1997541).

Almost surely, 2^13669988 is an apocalyptic number.

It is an amenable number.

13669988 is a deficient number, since it is larger than the sum of its proper divisors (10300504).

13669988 is a wasteful number, since it uses less digits than its factorization.

13669988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6862 (or 6860 counting only the distinct ones).

The product of its digits is 559872, while the sum is 50.

The square root of 13669988 is about 3697.2946866594. The cubic root of 13669988 is about 239.1053963464.

The spelling of 13669988 in words is "thirteen million, six hundred sixty-nine thousand, nine hundred eighty-eight".