13305330728 has 32 divisors (see below), whose sum is σ = 26009359200. Its totient is φ = 6375340608.

The previous prime is 13305330719. The next prime is 13305330817. The reversal of 13305330728 is 82703350331.

It is a super-2 number, since 2×13305330728² (a number of 21 digits) contains 22 as substring.

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, 346658 + ... + 383121.

It is an arithmetic number, because the mean of its divisors is an integer number (812792475).

Almost surely, 2^13305330728 is an apocalyptic number.

It is an amenable number.

13305330728 is a deficient number, since it is larger than the sum of its proper divisors (12704028472).

13305330728 is a wasteful number, since it uses less digits than its factorization.

13305330728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729881 (or 729877 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 35.

The spelling of 13305330728 in words is "thirteen billion, three hundred five million, three hundred thirty thousand, seven hundred twenty-eight".