13617988 has 6 divisors (see below), whose sum is σ = 23831486. Its totient is φ = 6808992.

The previous prime is 13617977. The next prime is 13618009. The reversal of 13617988 is 88971631.

It can be written as a sum of positive squares in only one way, i.e., 12730624 + 887364 = 3568^2 + 942^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1702245 + ... + 1702252.

Almost surely, 2^13617988 is an apocalyptic number.

It is an amenable number.

13617988 is a deficient number, since it is larger than the sum of its proper divisors (10213498).

13617988 is a wasteful number, since it uses less digits than its factorization.

13617988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3404501 (or 3404499 counting only the distinct ones).

The product of its digits is 72576, while the sum is 43.

The square root of 13617988 is about 3690.2558176907. The cubic root of 13617988 is about 238.8018291579.

The spelling of 13617988 in words is "thirteen million, six hundred seventeen thousand, nine hundred eighty-eight".