22745724 has 24 divisors (see below), whose sum is σ = 53623248. Its totient is φ = 7503360.

The previous prime is 22745719. The next prime is 22745729. The reversal of 22745724 is 42754722.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22745719) and next prime (22745729).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22745729) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 8607 + ... + 10934.

It is an arithmetic number, because the mean of its divisors is an integer number (2234302).

Almost surely, 2^22745724 is an apocalyptic number.

It is an amenable number.

22745724 is an abundant number, since it is smaller than the sum of its proper divisors (30877524).

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

22745724 is a wasteful number, since it uses less digits than its factorization.

22745724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19645 (or 19643 counting only the distinct ones).

The product of its digits is 31360, while the sum is 33.

The square root of 22745724 is about 4769.2477394239. The cubic root of 22745724 is about 283.3348016840.

The spelling of 22745724 in words is "twenty-two million, seven hundred forty-five thousand, seven hundred twenty-four".