28222932 has 48 divisors (see below), whose sum is σ = 69148800. Its totient is φ = 8942208.

The previous prime is 28222903. The next prime is 28222933. The reversal of 28222932 is 23922282.

It is a self number, because there is not a number n which added to its sum of digits gives 28222932.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28222933) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80694 + ... + 81042.

It is an arithmetic number, because the mean of its divisors is an integer number (1440600).

Almost surely, 2^28222932 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28222932, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34574400).

28222932 is an abundant number, since it is smaller than the sum of its proper divisors (40925868).

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

28222932 is a wasteful number, since it uses less digits than its factorization.

28222932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672 (or 670 counting only the distinct ones).

The product of its digits is 6912, while the sum is 30.

The square root of 28222932 is about 5312.5259528778. The cubic root of 28222932 is about 304.4626640411.

The spelling of 28222932 in words is "twenty-eight million, two hundred twenty-two thousand, nine hundred thirty-two".