13613988 has 24 divisors (see below), whose sum is σ = 31931200. Its totient is φ = 4514400.

The previous prime is 13613987. The next prime is 13613993. The reversal of 13613988 is 88931631.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (13613983) 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, 463 + ... + 5238.

Almost surely, 2^13613988 is an apocalyptic number.

It is an amenable number.

13613988 is an abundant number, since it is smaller than the sum of its proper divisors (18317212).

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

13613988 is a wasteful number, since it uses less digits than its factorization.

13613988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5907 (or 5905 counting only the distinct ones).

The product of its digits is 31104, while the sum is 39.

The square root of 13613988 is about 3689.7138100400. The cubic root of 13613988 is about 238.7784458491.

The spelling of 13613988 in words is "thirteen million, six hundred thirteen thousand, nine hundred eighty-eight".