22564690 has 8 divisors (see below), whose sum is σ = 40616460. Its totient is φ = 9025872.

The previous prime is 22564687. The next prime is 22564699. The reversal of 22564690 is 9646522.

It can be written as a sum of positive squares in 2 ways, for example, as 22382361 + 182329 = 4731^2 + 427^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×22564690² = 1018330469592200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22564699) 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, 1128225 + ... + 1128244.

Almost surely, 2^22564690 is an apocalyptic number.

22564690 is a deficient number, since it is larger than the sum of its proper divisors (18051770).

22564690 is a wasteful number, since it uses less digits than its factorization.

22564690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2256476.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 22564690 is about 4750.2305207221. The cubic root of 22564690 is about 282.5811080969.

The spelling of 22564690 in words is "twenty-two million, five hundred sixty-four thousand, six hundred ninety".