22440646 has 16 divisors (see below), whose sum is σ = 35928576. Its totient is φ = 10475136.

The previous prime is 22440643. The next prime is 22440679. The reversal of 22440646 is 64604422.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22440641) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 1720 + ... + 6916.

It is an arithmetic number, because the mean of its divisors is an integer number (2245536).

Almost surely, 2^22440646 is an apocalyptic number.

22440646 is a deficient number, since it is larger than the sum of its proper divisors (13487930).

22440646 is a wasteful number, since it uses less digits than its factorization.

22440646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5343.

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

The square root of 22440646 is about 4737.1558977935. The cubic root of 22440646 is about 282.0623489388.

The spelling of 22440646 in words is "twenty-two million, four hundred forty thousand, six hundred forty-six".