22224664 has 64 divisors (see below), whose sum is σ = 52588800. Its totient is φ = 8553600.

The previous prime is 22224617. The next prime is 22224667. The reversal of 22224664 is 46642222.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22224667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66979 + ... + 67309.

It is an arithmetic number, because the mean of its divisors is an integer number (821700).

Almost surely, 2^22224664 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 22224664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26294400).

22224664 is an abundant number, since it is smaller than the sum of its proper divisors (30364136).

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

22224664 is a wasteful number, since it uses less digits than its factorization.

22224664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464 (or 460 counting only the distinct ones).

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

The square root of 22224664 is about 4714.3041904400. The cubic root of 22224664 is about 281.1545187658.

Adding to 22224664 its reverse (46642222), we get a palindrome (68866886).

It can be divided in two parts, 2222 and 4664, that added together give a palindrome (6886).

The spelling of 22224664 in words is "twenty-two million, two hundred twenty-four thousand, six hundred sixty-four".