28312956722 has 18 divisors (see below), whose sum is σ = 43495784703. Its totient is φ = 13822260732.

The previous prime is 28312956689. The next prime is 28312956787. The reversal of 28312956722 is 22765921382.

It can be written as a sum of positive squares in only one way, i.e., 14156478361 + 14156478361 = 118981^2 + 118981^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=118981.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 10230983 + ... + 10233749.

Almost surely, 2^28312956722 is an apocalyptic number.

28312956722 is a deficient number, since it is larger than the sum of its proper divisors (15182827981).

28312956722 is an frugal number, since it uses more digits than its factorization.

28312956722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5622 (or 2812 counting only the distinct ones).

The product of its digits is 725760, while the sum is 47.

The spelling of 28312956722 in words is "twenty-eight billion, three hundred twelve million, nine hundred fifty-six thousand, seven hundred twenty-two".