22384428 has 96 divisors (see below), whose sum is σ = 60867072. Its totient is φ = 6336000.

The previous prime is 22384403. The next prime is 22384457. The reversal of 22384428 is 82448322.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 221578 + ... + 221678.

It is an arithmetic number, because the mean of its divisors is an integer number (634032).

Almost surely, 2^22384428 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 22384428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30433536).

22384428 is an abundant number, since it is smaller than the sum of its proper divisors (38482644).

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

22384428 is a wasteful number, since it uses less digits than its factorization.

22384428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215 (or 213 counting only the distinct ones).

The product of its digits is 24576, while the sum is 33.

The square root of 22384428 is about 4731.2184477151. The cubic root of 22384428 is about 281.8266123925.

It can be divided in two parts, 2238 and 4428, that added together give a palindrome (6666).

The spelling of 22384428 in words is "twenty-two million, three hundred eighty-four thousand, four hundred twenty-eight".