28665277922 has 18 divisors (see below), whose sum is σ = 45387276129. Its totient is φ = 13576134600.

The previous prime is 28665277897. The next prime is 28665277937. The reversal of 28665277922 is 22977256682.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 28268033161 + 397244761 = 168131^2 + 19931^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=119719.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4546172 + ... + 4552472.

Almost surely, 2^28665277922 is an apocalyptic number.

28665277922 is a deficient number, since it is larger than the sum of its proper divisors (16721998207).

28665277922 is an frugal number, since it uses more digits than its factorization.

28665277922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12642 (or 6322 counting only the distinct ones).

The product of its digits is 10160640, while the sum is 56.

The spelling of 28665277922 in words is "twenty-eight billion, six hundred sixty-five million, two hundred seventy-seven thousand, nine hundred twenty-two".