13971805028 has 24 divisors (see below), whose sum is σ = 26724063744. Its totient is φ = 6362870400.

The previous prime is 13971804967. The next prime is 13971805031. The reversal of 13971805028 is 82050817931.

It is a super-2 number, since 2×13971805028² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13971805028.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3311888 + ... + 3316103.

It is an arithmetic number, because the mean of its divisors is an integer number (1113502656).

Almost surely, 2^13971805028 is an apocalyptic number.

It is an amenable number.

13971805028 is a deficient number, since it is larger than the sum of its proper divisors (12752258716).

13971805028 is a wasteful number, since it uses less digits than its factorization.

13971805028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6628043 (or 6628041 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 44.

The spelling of 13971805028 in words is "thirteen billion, nine hundred seventy-one million, eight hundred five thousand, twenty-eight".