9729224 has 16 divisors (see below), whose sum is σ = 18735900. Its totient is φ = 4732992.

The previous prime is 9729217. The next prime is 9729227. The reversal of 9729224 is 4229279.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9060100 + 669124 = 3010^2 + 818^2 .

It is not an unprimeable number, because it can be changed into a prime (9729227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16139 + ... + 16730.

Almost surely, 2^9729224 is an apocalyptic number.

It is an amenable number.

9729224 is a deficient number, since it is larger than the sum of its proper divisors (9006676).

9729224 is a wasteful number, since it uses less digits than its factorization.

9729224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32912 (or 32908 counting only the distinct ones).

The product of its digits is 18144, while the sum is 35.

The square root of 9729224 is about 3119.1704025269. The cubic root of 9729224 is about 213.4810847120.

Subtracting from 9729224 its reverse (4229279), we obtain a palindrome (5499945).

The spelling of 9729224 in words is "nine million, seven hundred twenty-nine thousand, two hundred twenty-four".