22990920 has 64 divisors (see below), whose sum is σ = 69318720. Its totient is φ = 6100224.

The previous prime is 22990897. The next prime is 22990921. The reversal of 22990920 is 2909922.

It is not an unprimeable number, because it can be changed into a prime (22990921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33622 + ... + 34298.

It is an arithmetic number, because the mean of its divisors is an integer number (1083105).

Almost surely, 2^22990920 is an apocalyptic number.

22990920 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 22990920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34659360).

22990920 is an abundant number, since it is smaller than the sum of its proper divisors (46327800).

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

22990920 is a wasteful number, since it uses less digits than its factorization.

22990920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 974 (or 970 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 22990920 is about 4794.8847744237. The cubic root of 22990920 is about 284.3492694185.

The spelling of 22990920 in words is "twenty-two million, nine hundred ninety thousand, nine hundred twenty".