22406644 has 12 divisors (see below), whose sum is σ = 42228004. Its totient is φ = 10341504.

The previous prime is 22406627. The next prime is 22406653. The reversal of 22406644 is 44660422.

It can be written as a sum of positive squares in 2 ways, for example, as 6502500 + 15904144 = 2550^2 + 3988^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215397 + ... + 215500.

Almost surely, 2^22406644 is an apocalyptic number.

It is an amenable number.

22406644 is a deficient number, since it is larger than the sum of its proper divisors (19821360).

22406644 is a wasteful number, since it uses less digits than its factorization.

22406644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430914 (or 430912 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 22406644 is about 4733.5656750488. The cubic root of 22406644 is about 281.9198169161.

The spelling of 22406644 in words is "twenty-two million, four hundred six thousand, six hundred forty-four".