22408820 has 48 divisors (see below), whose sum is σ = 54606720. Its totient is φ = 7565184.

The previous prime is 22408817. The next prime is 22408871. The reversal of 22408820 is 2880422.

It is a self number, because there is not a number n which added to its sum of digits gives 22408820.

It is a congruent number.

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, 8186 + ... + 10574.

It is an arithmetic number, because the mean of its divisors is an integer number (1137640).

Almost surely, 2^22408820 is an apocalyptic number.

22408820 is a gapful number since it is divisible by the number (20) 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 22408820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27303360).

22408820 is an abundant number, since it is smaller than the sum of its proper divisors (32197900).

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

22408820 is a wasteful number, since it uses less digits than its factorization.

22408820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2472 (or 2470 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 26.

The square root of 22408820 is about 4733.7955173412. The cubic root of 22408820 is about 281.9289427460.

The spelling of 22408820 in words is "twenty-two million, four hundred eight thousand, eight hundred twenty".