13028321328 has 40 divisors (see below), whose sum is σ = 36716179776. Its totient is φ = 3947976000.

The previous prime is 13028321321. The next prime is 13028321329. The reversal of 13028321328 is 82312382031.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (13028321321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12336898 + ... + 12337953.

Almost surely, 2^13028321328 is an apocalyptic number.

It is an amenable number.

13028321328 is an abundant number, since it is smaller than the sum of its proper divisors (23687858448).

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

13028321328 is a wasteful number, since it uses less digits than its factorization.

13028321328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24674873 (or 24674867 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The spelling of 13028321328 in words is "thirteen billion, twenty-eight million, three hundred twenty-one thousand, three hundred twenty-eight".