22240440 has 64 divisors (see below), whose sum is σ = 74138400. Its totient is φ = 5930496.

The previous prime is 22240433. The next prime is 22240457. The reversal of 22240440 is 4404222.

22240440 is a `hidden beast` number, since 2 + 224 + 0 + 440 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9217 + ... + 11376.

Almost surely, 2^22240440 is an apocalyptic number.

22240440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22240440 is an abundant number, since it is smaller than the sum of its proper divisors (51897960).

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

22240440 is a wasteful number, since it uses less digits than its factorization.

22240440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20613 (or 20603 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 22240440 is about 4715.9770991810. The cubic root of 22240440 is about 281.2210281268.

Adding to 22240440 its reverse (4404222), we get a palindrome (26644662).

The spelling of 22240440 in words is "twenty-two million, two hundred forty thousand, four hundred forty".