22516644 has 48 divisors (see below), whose sum is σ = 55036800. Its totient is φ = 7155456.

The previous prime is 22516639. The next prime is 22516661. The reversal of 22516644 is 44661522.

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 in 15 ways as a sum of consecutive naturals, for example, 30609 + ... + 31335.

It is an arithmetic number, because the mean of its divisors is an integer number (1146600).

Almost surely, 2^22516644 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 22516644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27518400).

22516644 is an abundant number, since it is smaller than the sum of its proper divisors (32520156).

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

22516644 is a wasteful number, since it uses less digits than its factorization.

22516644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852 (or 850 counting only the distinct ones).

The product of its digits is 11520, while the sum is 30.

The square root of 22516644 is about 4745.1705975655. The cubic root of 22516644 is about 282.3804030785.

It can be divided in two parts, 2 and 2516644, that added together give a triangular number (2516646 = T₂₂₄₃).

The spelling of 22516644 in words is "twenty-two million, five hundred sixteen thousand, six hundred forty-four".