22422440 has 16 divisors (see below), whose sum is σ = 50450580. Its totient is φ = 8968960.

The previous prime is 22422437. The next prime is 22422457. The reversal of 22422440 is 4422422.

It can be written as a sum of positive squares in 2 ways, for example, as 21883684 + 538756 = 4678^2 + 734^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280241 + ... + 280320.

Almost surely, 2^22422440 is an apocalyptic number.

22422440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22422440 is an abundant number, since it is smaller than the sum of its proper divisors (28028140).

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

22422440 is a wasteful number, since it uses less digits than its factorization.

22422440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560572 (or 560568 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 22422440 is about 4735.2338907387. The cubic root of 22422440 is about 281.9860496427.

Adding to 22422440 its reverse (4422422), we get a palindrome (26844862).

The spelling of 22422440 in words is "twenty-two million, four hundred twenty-two thousand, four hundred forty".