22144040 has 16 divisors (see below), whose sum is σ = 49824180. Its totient is φ = 8857600.

The previous prime is 22144021. The next prime is 22144049. The reversal of 22144040 is 4044122.

It can be written as a sum of positive squares in 2 ways, for example, as 18541636 + 3602404 = 4306^2 + 1898^2 .

It is not an unprimeable number, because it can be changed into a prime (22144049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276761 + ... + 276840.

Almost surely, 2^22144040 is an apocalyptic number.

22144040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22144040 is an abundant number, since it is smaller than the sum of its proper divisors (27680140).

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

22144040 is a wasteful number, since it uses less digits than its factorization.

22144040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553612 (or 553608 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 22144040 is about 4705.7454244785. The cubic root of 22144040 is about 280.8141271508.

Adding to 22144040 its reverse (4044122), we get a palindrome (26188162).

The spelling of 22144040 in words is "twenty-two million, one hundred forty-four thousand, forty".