224391988 has 12 divisors (see below), whose sum is σ = 394085412. Its totient is φ = 111796160.

The previous prime is 224391971. The next prime is 224392001. The reversal of 224391988 is 889193422.

It can be written as a sum of positive squares in 2 ways, for example, as 77933584 + 146458404 = 8828^2 + 12102^2 .

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, 98695 + ... + 100942.

It is an arithmetic number, because the mean of its divisors is an integer number (32840451).

Almost surely, 2^224391988 is an apocalyptic number.

It is an amenable number.

224391988 is a deficient number, since it is larger than the sum of its proper divisors (169693424).

224391988 is a wasteful number, since it uses less digits than its factorization.

224391988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199922 (or 199920 counting only the distinct ones).

The product of its digits is 248832, while the sum is 46.

The square root of 224391988 is about 14979.7192230028. The cubic root of 224391988 is about 607.6718458001.

The spelling of 224391988 in words is "two hundred twenty-four million, three hundred ninety-one thousand, nine hundred eighty-eight".