22632428 has 48 divisors (see below), whose sum is σ = 49326144. Its totient is φ = 8847360.

The previous prime is 22632377. The next prime is 22632443. The reversal of 22632428 is 82423622.

It is a self number, because there is not a number n which added to its sum of digits gives 22632428.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34988 + ... + 35628.

It is an arithmetic number, because the mean of its divisors is an integer number (1027628).

Almost surely, 2^22632428 is an apocalyptic number.

22632428 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22632428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24663072).

22632428 is an abundant number, since it is smaller than the sum of its proper divisors (26693716).

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

22632428 is a wasteful number, since it uses less digits than its factorization.

22632428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762 (or 760 counting only the distinct ones).

The product of its digits is 9216, while the sum is 29.

The square root of 22632428 is about 4757.3551475584. The cubic root of 22632428 is about 282.8635901087.

The spelling of 22632428 in words is "twenty-two million, six hundred thirty-two thousand, four hundred twenty-eight".