22090320 has 200 divisors, whose sum is σ = 87863424. Its totient is φ = 5038848.

The previous prime is 22090319. The next prime is 22090333. The reversal of 22090320 is 2309022.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 22090293 and 22090302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 45117 + ... + 45603.

Almost surely, 2^22090320 is an apocalyptic number.

22090320 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 22090320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43931712).

22090320 is an abundant number, since it is smaller than the sum of its proper divisors (65773104).

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

22090320 is a wasteful number, since it uses less digits than its factorization.

22090320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519 (or 504 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 22090320 is about 4700.0340424299. The cubic root of 22090320 is about 280.5868643439.

Adding to 22090320 its reverse (2309022), we get a palindrome (24399342).

The spelling of 22090320 in words is "twenty-two million, ninety thousand, three hundred twenty".