22688320 has 28 divisors (see below), whose sum is σ = 54027324. Its totient is φ = 9075200.

The previous prime is 22688287. The next prime is 22688321. The reversal of 22688320 is 2388622.

It can be written as a sum of positive squares in 2 ways, for example, as 16257024 + 6431296 = 4032^2 + 2536^2 .

It is not an unprimeable number, because it can be changed into a prime (22688321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35131 + ... + 35770.

Almost surely, 2^22688320 is an apocalyptic number.

22688320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22688320 is an abundant number, since it is smaller than the sum of its proper divisors (31339004).

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

22688320 is an equidigital number, since it uses as much as digits as its factorization.

22688320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70918 (or 70908 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 22688320 is about 4763.2257977131. The cubic root of 22688320 is about 283.0962476508.

The spelling of 22688320 in words is "twenty-two million, six hundred eighty-eight thousand, three hundred twenty".