22440208 has 40 divisors (see below), whose sum is σ = 49996800. Its totient is φ = 9557760.

The previous prime is 22440179. The next prime is 22440239. The reversal of 22440208 is 80204422.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20868 + ... + 21916.

It is an arithmetic number, because the mean of its divisors is an integer number (1249920).

Almost surely, 2^22440208 is an apocalyptic number.

22440208 is a gapful number since it is divisible by the number (28) 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 22440208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24998400).

22440208 is an abundant number, since it is smaller than the sum of its proper divisors (27556592).

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

22440208 is a wasteful number, since it uses less digits than its factorization.

22440208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1255 (or 1249 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 22440208 is about 4737.1096672971. The cubic root of 22440208 is about 282.0605138147.

The spelling of 22440208 in words is "twenty-two million, four hundred forty thousand, two hundred eight".