13728907138 has 16 divisors (see below), whose sum is σ = 21585102336. Its totient is φ = 6536550240.

The previous prime is 13728907061. The next prime is 13728907147. The reversal of 13728907138 is 83170982731.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 13728907091 and 13728907100.

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, 658923 + ... + 679438.

It is an arithmetic number, because the mean of its divisors is an integer number (1349068896).

Almost surely, 2^13728907138 is an apocalyptic number.

13728907138 is a deficient number, since it is larger than the sum of its proper divisors (7856195198).

13728907138 is a wasteful number, since it uses less digits than its factorization.

13728907138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1338609.

The product of its (nonzero) digits is 508032, while the sum is 49.

The spelling of 13728907138 in words is "thirteen billion, seven hundred twenty-eight million, nine hundred seven thousand, one hundred thirty-eight".