22440220 has 24 divisors (see below), whose sum is σ = 51409008. Its totient is φ = 8160000.

The previous prime is 22440179. The next prime is 22440239. The reversal of 22440220 is 2204422.

It is a junction number, because it is equal to n+sod(n) for n = 22440194 and 22440203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50781 + ... + 51220.

It is an arithmetic number, because the mean of its divisors is an integer number (2142042).

Almost surely, 2^22440220 is an apocalyptic number.

22440220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22440220 is an abundant number, since it is smaller than the sum of its proper divisors (28968788).

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

22440220 is a wasteful number, since it uses less digits than its factorization.

22440220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102021 (or 102019 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 22440220 is about 4737.1109338921. The cubic root of 22440220 is about 282.0605640924.

Adding to 22440220 its reverse (2204422), we get a palindrome (24644642).

It can be divided in two parts, 224402 and 20, that added together give a palindrome (224422).

The spelling of 22440220 in words is "twenty-two million, four hundred forty thousand, two hundred twenty".