22406564 has 6 divisors (see below), whose sum is σ = 39211494. Its totient is φ = 11203280.

The previous prime is 22406543. The next prime is 22406627. The reversal of 22406564 is 46560422.

It can be written as a sum of positive squares in only one way, i.e., 22278400 + 128164 = 4720^2 + 358^2 .

It is a super-2 number, since 2×22406564² = 1004108220572192, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2800817 + ... + 2800824.

It is an arithmetic number, because the mean of its divisors is an integer number (6535249).

Almost surely, 2^22406564 is an apocalyptic number.

It is an amenable number.

22406564 is a deficient number, since it is larger than the sum of its proper divisors (16804930).

22406564 is a wasteful number, since it uses less digits than its factorization.

22406564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5601645 (or 5601643 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 22406564 is about 4733.5572247518. The cubic root of 22406564 is about 281.9194813964.

Adding to 22406564 its reverse (46560422), we get a palindrome (68966986).

The spelling of 22406564 in words is "twenty-two million, four hundred six thousand, five hundred sixty-four".