22644006 has 64 divisors (see below), whose sum is σ = 58945536. Its totient is φ = 5623200.

The previous prime is 22643969. The next prime is 22644019. The reversal of 22644006 is 60044622.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9561 + ... + 11691.

It is an arithmetic number, because the mean of its divisors is an integer number (921024).

Almost surely, 2^22644006 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22644006, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29472768).

22644006 is an abundant number, since it is smaller than the sum of its proper divisors (36301530).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22644006 is a wasteful number, since it uses less digits than its factorization.

22644006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2177.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 22644006 is about 4758.5718445769. The cubic root of 22644006 is about 282.9118164316.

Adding to 22644006 its reverse (60044622), we get a palindrome (82688628).

The spelling of 22644006 in words is "twenty-two million, six hundred forty-four thousand, six".