28320612132 has 12 divisors (see below), whose sum is σ = 66081428336. Its totient is φ = 9440204040.

The previous prime is 28320612107. The next prime is 28320612167. The reversal of 28320612132 is 23121602382.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 28320612132.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1180025494 + ... + 1180025517.

Almost surely, 2^28320612132 is an apocalyptic number.

It is an amenable number.

28320612132 is an abundant number, since it is smaller than the sum of its proper divisors (37760816204).

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

28320612132 is a wasteful number, since it uses less digits than its factorization.

28320612132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2360051018 (or 2360051016 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The spelling of 28320612132 in words is "twenty-eight billion, three hundred twenty million, six hundred twelve thousand, one hundred thirty-two".