22730224 has 80 divisors (see below), whose sum is σ = 52068096. Its totient is φ = 9497600.

The previous prime is 22730221. The next prime is 22730249. The reversal of 22730224 is 42203722.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 22730195 and 22730204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22730221) 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, 212379 + ... + 212485.

Almost surely, 2^22730224 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 22730224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26034048).

22730224 is an abundant number, since it is smaller than the sum of its proper divisors (29337872).

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

22730224 is a wasteful number, since it uses less digits than its factorization.

22730224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214 (or 208 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 22.

The square root of 22730224 is about 4767.6224682749. The cubic root of 22730224 is about 283.2704278649.

Adding to 22730224 its reverse (42203722), we get a palindrome (64933946).

The spelling of 22730224 in words is "twenty-two million, seven hundred thirty thousand, two hundred twenty-four".