28320772712 has 32 divisors (see below), whose sum is σ = 55502928000. Its totient is φ = 13522052544.

The previous prime is 28320772679. The next prime is 28320772729. The reversal of 28320772712 is 21727702382.

It is a self number, because there is not a number n which added to its sum of digits gives 28320772712.

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, 18263 + ... + 238694.

It is an arithmetic number, because the mean of its divisors is an integer number (1734466500).

Almost surely, 2^28320772712 is an apocalyptic number.

It is an amenable number.

28320772712 is a deficient number, since it is larger than the sum of its proper divisors (27182155288).

28320772712 is a wasteful number, since it uses less digits than its factorization.

28320772712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257585 (or 257581 counting only the distinct ones).

The product of its (nonzero) digits is 131712, while the sum is 41.

The spelling of 28320772712 in words is "twenty-eight billion, three hundred twenty million, seven hundred seventy-two thousand, seven hundred twelve".