22440660 has 96 divisors (see below), whose sum is σ = 69358464. Its totient is φ = 5420800.

The previous prime is 22440643. The next prime is 22440679. The reversal of 22440660 is 6604422.

It is a self number, because there is not a number n which added to its sum of digits gives 22440660.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 79720 + ... + 80000.

It is an arithmetic number, because the mean of its divisors is an integer number (722484).

Almost surely, 2^22440660 is an apocalyptic number.

22440660 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 22440660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34679232).

22440660 is an abundant number, since it is smaller than the sum of its proper divisors (46917804).

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

22440660 is a wasteful number, since it uses less digits than its factorization.

22440660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326 (or 302 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 22440660 is about 4737.1573754732. The cubic root of 22440660 is about 282.0624075953.

The spelling of 22440660 in words is "twenty-two million, four hundred forty thousand, six hundred sixty".