28812222 has 24 divisors (see below), whose sum is σ = 63756576. Its totient is φ = 9399456.

The previous prime is 28812209. The next prime is 28812247. The reversal of 28812222 is 22221882.

It is a congruent 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 11 ways as a sum of consecutive naturals, for example, 16183 + ... + 17874.

It is an arithmetic number, because the mean of its divisors is an integer number (2656524).

Almost surely, 2^28812222 is an apocalyptic number.

28812222 is an abundant number, since it is smaller than the sum of its proper divisors (34944354).

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

28812222 is a wasteful number, since it uses less digits than its factorization.

28812222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34112 (or 34109 counting only the distinct ones).

The product of its digits is 2048, while the sum is 27.

The square root of 28812222 is about 5367.7017428318. The cubic root of 28812222 is about 306.5671271672.

The spelling of 28812222 in words is "twenty-eight million, eight hundred twelve thousand, two hundred twenty-two".