28338222 has 16 divisors (see below), whose sum is σ = 61828992. Its totient is φ = 8587320.

The previous prime is 28338187. The next prime is 28338229. The reversal of 28338222 is 22283382.

It is a super-2 number, since 2×28338222² = 1606109652242568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28338222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28338229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214618 + ... + 214749.

It is an arithmetic number, because the mean of its divisors is an integer number (3864312).

Almost surely, 2^28338222 is an apocalyptic number.

28338222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28338222 is an abundant number, since it is smaller than the sum of its proper divisors (33490770).

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

28338222 is a wasteful number, since it uses less digits than its factorization.

28338222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429383.

The product of its digits is 9216, while the sum is 30.

The square root of 28338222 is about 5323.3656646900. The cubic root of 28338222 is about 304.8766750357.

The spelling of 28338222 in words is "twenty-eight million, three hundred thirty-eight thousand, two hundred twenty-two".