28112342228 has 12 divisors (see below), whose sum is σ = 49260579060. Its totient is φ = 14037891072.

The previous prime is 28112342177. The next prime is 28112342231. The reversal of 28112342228 is 82224321182.

It can be written as a sum of positive squares in 2 ways, for example, as 7352719504 + 20759622724 = 85748^2 + 144082^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4566551 + ... + 4572702.

It is an arithmetic number, because the mean of its divisors is an integer number (4105048255).

Almost surely, 2^28112342228 is an apocalyptic number.

It is an amenable number.

28112342228 is a deficient number, since it is larger than the sum of its proper divisors (21148236832).

28112342228 is a wasteful number, since it uses less digits than its factorization.

28112342228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9140026 (or 9140024 counting only the distinct ones).

The product of its digits is 24576, while the sum is 35.

The spelling of 28112342228 in words is "twenty-eight billion, one hundred twelve million, three hundred forty-two thousand, two hundred twenty-eight".