22010440 has 32 divisors (see below), whose sum is σ = 50735160. Its totient is φ = 8588800.

The previous prime is 22010431. The next prime is 22010477. The reversal of 22010440 is 4401022.

It can be written as a sum of positive squares in 4 ways, for example, as 17422276 + 4588164 = 4174^2 + 2142^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22010440.

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 7 ways as a sum of consecutive naturals, for example, 5071 + ... + 8350.

Almost surely, 2^22010440 is an apocalyptic number.

22010440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22010440 is an abundant number, since it is smaller than the sum of its proper divisors (28724720).

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

22010440 is a wasteful number, since it uses less digits than its factorization.

22010440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13473 (or 13469 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 22010440 is about 4691.5285355628. The cubic root of 22010440 is about 280.2482492239.

Adding to 22010440 its reverse (4401022), we get a palindrome (26411462).

The spelling of 22010440 in words is "twenty-two million, ten thousand, four hundred forty".