22040724 has 12 divisors (see below), whose sum is σ = 51428384. Its totient is φ = 7346904.

The previous prime is 22040713. The next prime is 22040731. The reversal of 22040724 is 42704022.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 22040724.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 918352 + ... + 918375.

Almost surely, 2^22040724 is an apocalyptic number.

It is an amenable number.

22040724 is an abundant number, since it is smaller than the sum of its proper divisors (29387660).

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

22040724 is a wasteful number, since it uses less digits than its factorization.

22040724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1836734 (or 1836732 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 21.

The square root of 22040724 is about 4694.7549456814. The cubic root of 22040724 is about 280.3767208118.

Adding to 22040724 its reverse (42704022), we get a palindrome (64744746).

The spelling of 22040724 in words is "twenty-two million, forty thousand, seven hundred twenty-four".