22166724 has 24 divisors (see below), whose sum is σ = 51847488. Its totient is φ = 7371040.

The previous prime is 22166719. The next prime is 22166741. The reversal of 22166724 is 42766122.

It is a junction number, because it is equal to n+sod(n) for n = 22166691 and 22166700.

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 7 ways as a sum of consecutive naturals, for example, 3529 + ... + 7535.

It is an arithmetic number, because the mean of its divisors is an integer number (2160312).

Almost surely, 2^22166724 is an apocalyptic number.

It is an amenable number.

22166724 is an abundant number, since it is smaller than the sum of its proper divisors (29680764).

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

22166724 is a wasteful number, since it uses less digits than its factorization.

22166724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4475 (or 4473 counting only the distinct ones).

The product of its digits is 8064, while the sum is 30.

The square root of 22166724 is about 4708.1550526719. The cubic root of 22166724 is about 280.9099815928.

It can be divided in two parts, 2216672 and 4, that multiplied together give a palindrome (8866688).

The spelling of 22166724 in words is "twenty-two million, one hundred sixty-six thousand, seven hundred twenty-four".