22004840 has 64 divisors (see below), whose sum is σ = 58181760. Its totient is φ = 7384320.

The previous prime is 22004833. The next prime is 22004849. The reversal of 22004840 is 4840022.

It is a Harshad number since it is a multiple of its sum of digits (20).

22004840 is a modest number, since divided by 4840 gives 2200 as remainder.

It is not an unprimeable number, because it can be changed into a prime (22004849) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3797 + ... + 7643.

It is an arithmetic number, because the mean of its divisors is an integer number (909090).

Almost surely, 2^22004840 is an apocalyptic number.

22004840 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 22004840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29090880).

22004840 is an abundant number, since it is smaller than the sum of its proper divisors (36176920).

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

22004840 is a wasteful number, since it uses less digits than its factorization.

22004840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3882 (or 3878 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 22004840 is about 4690.9316771831. The cubic root of 22004840 is about 280.2244798473.

Adding to 22004840 its reverse (4840022), we get a palindrome (26844862).

It can be divided in two parts, 2200 and 4840, that multiplied together give a cube (10648000 = 220³).

The spelling of 22004840 in words is "twenty-two million, four thousand, eight hundred forty".