13728397432 has 8 divisors (see below), whose sum is σ = 25740745200. Its totient is φ = 6864198712.

The previous prime is 13728397421. The next prime is 13728397471. The reversal of 13728397432 is 23479382731.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 858024832 + ... + 858024847.

It is an arithmetic number, because the mean of its divisors is an integer number (3217593150).

Almost surely, 2^13728397432 is an apocalyptic number.

It is an amenable number.

13728397432 is a deficient number, since it is larger than the sum of its proper divisors (12012347768).

13728397432 is a wasteful number, since it uses less digits than its factorization.

13728397432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1716049685 (or 1716049681 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 49.

The spelling of 13728397432 in words is "thirteen billion, seven hundred twenty-eight million, three hundred ninety-seven thousand, four hundred thirty-two".