22112040 has 64 divisors (see below), whose sum is σ = 67017600. Its totient is φ = 5836032.

The previous prime is 22112033. The next prime is 22112063. The reversal of 22112040 is 4021122.

It is a Harshad number since it is a multiple of its sum of digits (12).

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 15 ways as a sum of consecutive naturals, for example, 11466 + ... + 13254.

It is an arithmetic number, because the mean of its divisors is an integer number (1047150).

Almost surely, 2^22112040 is an apocalyptic number.

22112040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22112040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33508800).

22112040 is an abundant number, since it is smaller than the sum of its proper divisors (44905560).

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

22112040 is a wasteful number, since it uses less digits than its factorization.

22112040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1906 (or 1902 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 22112040 is about 4702.3440962992. The cubic root of 22112040 is about 280.6787952649.

Adding to 22112040 its reverse (4021122), we get a palindrome (26133162).

The spelling of 22112040 in words is "twenty-two million, one hundred twelve thousand, forty".