13991386028 has 12 divisors (see below), whose sum is σ = 24779925240. Its totient is φ = 6911407392.

The previous prime is 13991386027. The next prime is 13991386033. The reversal of 13991386028 is 82068319931.

It is not an unprimeable number, because it can be changed into a prime (13991386027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21071033 + ... + 21071696.

It is an arithmetic number, because the mean of its divisors is an integer number (2064993770).

Almost surely, 2^13991386028 is an apocalyptic number.

It is an amenable number.

13991386028 is a deficient number, since it is larger than the sum of its proper divisors (10788539212).

13991386028 is a wasteful number, since it uses less digits than its factorization.

13991386028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42142816 (or 42142814 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 50.

The spelling of 13991386028 in words is "thirteen billion, nine hundred ninety-one million, three hundred eighty-six thousand, twenty-eight".