22816644 has 72 divisors (see below), whose sum is σ = 58887360. Its totient is φ = 6861888.

The previous prime is 22816627. The next prime is 22816687. The reversal of 22816644 is 44661822.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

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 23 ways as a sum of consecutive naturals, for example, 99522 + ... + 99750.

It is an arithmetic number, because the mean of its divisors is an integer number (817880).

Almost surely, 2^22816644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22816644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29443680).

22816644 is an abundant number, since it is smaller than the sum of its proper divisors (36070716).

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

22816644 is a wasteful number, since it uses less digits than its factorization.

22816644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297 (or 276 counting only the distinct ones).

The product of its digits is 18432, while the sum is 33.

The square root of 22816644 is about 4776.6770876834. The cubic root of 22816644 is about 283.6289706175.

The spelling of 22816644 in words is "twenty-two million, eight hundred sixteen thousand, six hundred forty-four".