13998387 has 16 divisors (see below), whose sum is σ = 20795040. Its totient is φ = 8316672.

The previous prime is 13998353. The next prime is 13998427. The reversal of 13998387 is 78389931.

13998387 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13998387 - 2⁶ = 13998323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13998587) 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 15 ways as a sum of consecutive naturals, for example, 5058 + ... + 7319.

It is an arithmetic number, because the mean of its divisors is an integer number (1299690).

Almost surely, 2^13998387 is an apocalyptic number.

13998387 is a deficient number, since it is larger than the sum of its proper divisors (6796653).

13998387 is a wasteful number, since it uses less digits than its factorization.

13998387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12422.

The product of its digits is 326592, while the sum is 48.

The square root of 13998387 is about 3741.4418343735. The cubic root of 13998387 is about 241.0049699680.

The spelling of 13998387 in words is "thirteen million, nine hundred ninety-eight thousand, three hundred eighty-seven".