13439545728 has 256 divisors, whose sum is σ = 43502592000. Its totient is φ = 3590645760.

The previous prime is 13439545699. The next prime is 13439545733. The reversal of 13439545728 is 82754593431.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4033023 + ... + 4036353.

It is an arithmetic number, because the mean of its divisors is an integer number (169932000).

Almost surely, 2^13439545728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13439545728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21751296000).

13439545728 is an abundant number, since it is smaller than the sum of its proper divisors (30063046272).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13439545728 is a wasteful number, since it uses less digits than its factorization.

13439545728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3453 (or 3441 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 51.

The spelling of 13439545728 in words is "thirteen billion, four hundred thirty-nine million, five hundred forty-five thousand, seven hundred twenty-eight".