13809988 has 6 divisors (see below), whose sum is σ = 24167486. Its totient is φ = 6904992.

The previous prime is 13809977. The next prime is 13810031. The reversal of 13809988 is 88990831.

It can be written as a sum of positive squares in only one way, i.e., 11505664 + 2304324 = 3392^2 + 1518^2 .

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, 1726245 + ... + 1726252.

Almost surely, 2^13809988 is an apocalyptic number.

It is an amenable number.

13809988 is a deficient number, since it is larger than the sum of its proper divisors (10357498).

13809988 is a wasteful number, since it uses less digits than its factorization.

13809988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3452501 (or 3452499 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 46.

The square root of 13809988 is about 3716.1792206512. The cubic root of 13809988 is about 239.9188846247.

The spelling of 13809988 in words is "thirteen million, eight hundred nine thousand, nine hundred eighty-eight".