223638724 has 12 divisors (see below), whose sum is σ = 392498064. Its totient is φ = 111496424.

The previous prime is 223638707. The next prime is 223638739. The reversal of 223638724 is 427836322.

223638724 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 3 ways as a sum of consecutive naturals, for example, 79174 + ... + 81949.

It is an arithmetic number, because the mean of its divisors is an integer number (32708172).

Almost surely, 2^223638724 is an apocalyptic number.

It is an amenable number.

223638724 is a deficient number, since it is larger than the sum of its proper divisors (168859340).

223638724 is a wasteful number, since it uses less digits than its factorization.

223638724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161474 (or 161472 counting only the distinct ones).

The product of its digits is 96768, while the sum is 37.

The square root of 223638724 is about 14954.5552926190. Note that the first 3 decimals coincide. The cubic root of 223638724 is about 606.9911166867.

The spelling of 223638724 in words is "two hundred twenty-three million, six hundred thirty-eight thousand, seven hundred twenty-four".