13603988 has 12 divisors (see below), whose sum is σ = 24133620. Its totient is φ = 6708672.

The previous prime is 13603979. The next prime is 13604011. The reversal of 13603988 is 88930631.

13603988 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 3694084 + 9909904 = 1922^2 + 3148^2 .

It is a congruent number.

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, 23003 + ... + 23586.

It is an arithmetic number, because the mean of its divisors is an integer number (2011135).

Almost surely, 2^13603988 is an apocalyptic number.

It is an amenable number.

13603988 is a deficient number, since it is larger than the sum of its proper divisors (10529632).

13603988 is a wasteful number, since it uses less digits than its factorization.

13603988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46666 (or 46664 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 13603988 is about 3688.3584424511. The cubic root of 13603988 is about 238.7199675316.

The spelling of 13603988 in words is "thirteen million, six hundred three thousand, nine hundred eighty-eight".