22409328 has 40 divisors (see below), whose sum is σ = 58499728. Its totient is φ = 7391232.

The previous prime is 22409327. The next prime is 22409333. The reversal of 22409328 is 82390422.

It is a junction number, because it is equal to n+sod(n) for n = 22409295 and 22409304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22409323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2250 + ... + 7062.

Almost surely, 2^22409328 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 22409328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29249864).

22409328 is an abundant number, since it is smaller than the sum of its proper divisors (36090400).

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

22409328 is a wasteful number, since it uses less digits than its factorization.

22409328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4921 (or 4915 counting only the distinct ones).

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

The square root of 22409328 is about 4733.8491737697. The cubic root of 22409328 is about 281.9310731396.

The spelling of 22409328 in words is "twenty-two million, four hundred nine thousand, three hundred twenty-eight".