28123545222 has 48 divisors (see below), whose sum is σ = 64262278080. Its totient is φ = 9215615592.

The previous prime is 28123545221. The next prime is 28123545223. The reversal of 28123545222 is 22254532182.

28123545222 is a `hidden beast` number, since 2 + 8 + 123 + 5 + 4 + 522 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (28123545221) and next prime (28123545223).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28123545221) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 461728 + ... + 519075.

It is an arithmetic number, because the mean of its divisors is an integer number (1338797460).

Almost surely, 2^28123545222 is an apocalyptic number.

28123545222 is an abundant number, since it is smaller than the sum of its proper divisors (36138732858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28123545222 is an equidigital number, since it uses as much as digits as its factorization.

28123545222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980879 (or 980867 counting only the distinct ones).

The product of its digits is 76800, while the sum is 36.

The spelling of 28123545222 in words is "twenty-eight billion, one hundred twenty-three million, five hundred forty-five thousand, two hundred twenty-two".