13988515 has 8 divisors (see below), whose sum is σ = 16940880. Its totient is φ = 11087712.

The previous prime is 13988477. The next prime is 13988521. The reversal of 13988515 is 51588931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13988515 is a prime.

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 in 7 ways as a sum of consecutive naturals, for example, 12289 + ... + 13378.

It is an arithmetic number, because the mean of its divisors is an integer number (2117610).

Almost surely, 2^13988515 is an apocalyptic number.

13988515 is a deficient number, since it is larger than the sum of its proper divisors (2952365).

13988515 is a wasteful number, since it uses less digits than its factorization.

13988515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25781.

The product of its digits is 43200, while the sum is 40.

The square root of 13988515 is about 3740.1223242028. The cubic root of 13988515 is about 240.9483024731.

The spelling of 13988515 in words is "thirteen million, nine hundred eighty-eight thousand, five hundred fifteen".