22408840 has 16 divisors (see below), whose sum is σ = 50419980. Its totient is φ = 8963520.

The previous prime is 22408817. The next prime is 22408871. The reversal of 22408840 is 4880422.

It can be written as a sum of positive squares in 2 ways, for example, as 22297284 + 111556 = 4722^2 + 334^2 .

It is a super-2 number, since 2×22408840² = 1004312220291200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22408799 and 22408808.

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 3 ways as a sum of consecutive naturals, for example, 280071 + ... + 280150.

Almost surely, 2^22408840 is an apocalyptic number.

22408840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22408840 is an abundant number, since it is smaller than the sum of its proper divisors (28011140).

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

22408840 is a wasteful number, since it uses less digits than its factorization.

22408840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560232 (or 560228 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 28.

The square root of 22408840 is about 4733.7976298106. The cubic root of 22408840 is about 281.9290266203.

The spelling of 22408840 in words is "twenty-two million, four hundred eight thousand, eight hundred forty".