22089564 has 96 divisors (see below), whose sum is σ = 66662400. Its totient is φ = 6194880.

The previous prime is 22089539. The next prime is 22089583. The reversal of 22089564 is 46598022.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45877 + ... + 46355.

It is an arithmetic number, because the mean of its divisors is an integer number (694400).

Almost surely, 2^22089564 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 22089564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33331200).

22089564 is an abundant number, since it is smaller than the sum of its proper divisors (44572836).

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

22089564 is a wasteful number, since it uses less digits than its factorization.

22089564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560 (or 552 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 22089564 is about 4699.9536167924. The cubic root of 22089564 is about 280.5836634533.

The spelling of 22089564 in words is "twenty-two million, eighty-nine thousand, five hundred sixty-four".