22408920 has 64 divisors (see below), whose sum is σ = 74700000. Its totient is φ = 5975424.

The previous prime is 22408901. The next prime is 22408937. The reversal of 22408920 is 2980422.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 9295 + ... + 11454.

Almost surely, 2^22408920 is an apocalyptic number.

22408920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22408920 is an abundant number, since it is smaller than the sum of its proper divisors (52291080).

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

22408920 is a wasteful number, since it uses less digits than its factorization.

22408920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20769 (or 20759 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 22408920 is about 4733.8060796784. The cubic root of 22408920 is about 281.9293621173.

The spelling of 22408920 in words is "twenty-two million, four hundred eight thousand, nine hundred twenty".