28028122322 has 18 divisors (see below), whose sum is σ = 43958119863. Its totient is φ = 13402149772.

The previous prime is 28028122307. The next prime is 28028122433. The reversal of 28028122322 is 22322182082.

It can be written as a sum of positive squares in only one way, i.e., 14014061161 + 14014061161 = 118381^2 + 118381^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=118381.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5442953 + ... + 5448099.

Almost surely, 2^28028122322 is an apocalyptic number.

28028122322 is a deficient number, since it is larger than the sum of its proper divisors (15929997541).

28028122322 is an frugal number, since it uses more digits than its factorization.

28028122322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10342 (or 5172 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 32.

Multiplying 28028122322 by its sum of digits (32), we get a square (896899914304 = 947048²).

The spelling of 28028122322 in words is "twenty-eight billion, twenty-eight million, one hundred twenty-two thousand, three hundred twenty-two".