13990988 has 36 divisors (see below), whose sum is σ = 27237336. Its totient is φ = 6283200.

The previous prime is 13990987. The next prime is 13991009. The reversal of 13990988 is 88909931.

It is a super-2 number, since 2×13990988² = 391495490432288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13990987) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 66203 + ... + 66413.

Almost surely, 2^13990988 is an apocalyptic number.

It is an amenable number.

13990988 is a deficient number, since it is larger than the sum of its proper divisors (13246348).

13990988 is a wasteful number, since it uses less digits than its factorization.

13990988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374 (or 361 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 47.

The square root of 13990988 is about 3740.4529137526. The cubic root of 13990988 is about 240.9625005502.

The spelling of 13990988 in words is "thirteen million, nine hundred ninety thousand, nine hundred eighty-eight".