22090312 has 24 divisors (see below), whose sum is σ = 43719750. Its totient is φ = 10462464.

The previous prime is 22090309. The next prime is 22090319. The reversal of 22090312 is 21309022.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 21846276 + 244036 = 4674^2 + 494^2 .

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 22090312.

It is not an unprimeable number, because it can be changed into a prime (22090319) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 937 + ... + 6712.

Almost surely, 2^22090312 is an apocalyptic number.

It is an amenable number.

22090312 is a deficient number, since it is larger than the sum of its proper divisors (21629438).

22090312 is a wasteful number, since it uses less digits than its factorization.

22090312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7693 (or 7670 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 22090312 is about 4700.0331913722. The cubic root of 22090312 is about 280.5868304724.

Adding to 22090312 its reverse (21309022), we get a palindrome (43399334).

The spelling of 22090312 in words is "twenty-two million, ninety thousand, three hundred twelve".