28320788673 has 32 divisors (see below), whose sum is σ = 42259817600. Its totient is φ = 18744343488.

The previous prime is 28320788669. The next prime is 28320788693. The reversal of 28320788673 is 37688702382.

It is not a de Polignac number, because 28320788673 - 2² = 28320788669 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28320788623) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7072890 + ... + 7076892.

It is an arithmetic number, because the mean of its divisors is an integer number (1320619300).

Almost surely, 2^28320788673 is an apocalyptic number.

It is an amenable number.

28320788673 is a deficient number, since it is larger than the sum of its proper divisors (13939028927).

28320788673 is a wasteful number, since it uses less digits than its factorization.

28320788673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5838 (or 5832 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 54.

The spelling of 28320788673 in words is "twenty-eight billion, three hundred twenty million, seven hundred eighty-eight thousand, six hundred seventy-three".