28178218122 has 16 divisors (see below), whose sum is σ = 57280312992. Its totient is φ = 9238759920.

The previous prime is 28178218121. The next prime is 28178218139. The reversal of 28178218122 is 22181287182.

It is not an unprimeable number, because it can be changed into a prime (28178218121) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 38494468 + ... + 38495199.

It is an arithmetic number, because the mean of its divisors is an integer number (3580019562).

Almost surely, 2^28178218122 is an apocalyptic number.

28178218122 is an abundant number, since it is smaller than the sum of its proper divisors (29102094870).

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

28178218122 is a wasteful number, since it uses less digits than its factorization.

28178218122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76989733.

The product of its digits is 57344, while the sum is 42.

The spelling of 28178218122 in words is "twenty-eight billion, one hundred seventy-eight million, two hundred eighteen thousand, one hundred twenty-two".