write a C program using sub-functions , to check whether it is an odd, prime, and perfect square number, and also display its all divisors and factorial

#include <stdio.h>
#include <math.h>

int isOdd(int n)
{
    if(n%2==0)
    return 0; //odd number
    else return 1;  //even number
}

int isPrime(int n)
{
	for(int i=2;i<=n/2;i++)
	{
		if(n%i!=0)
			continue;
		else
			return 1;
	}
	return 0;
}

int isPerfectSquare(int n)
{
    int iVar;
    float fVar;
 
    fVar=sqrt((double)n);
    iVar=fVar;
 
    if(iVar==fVar)
        return 1;
    else
        return 0;  
}

void showDivisors(int n)
{
    for (int i=1;i<=n;i++)
        if (n%i==0)
            printf("%d ",i);
}

int factorial(int n)
{
  int res = 1, i;
    for (i = 2; i <= n; i++)
        res *= i;
    return res;
}

int main()
{
    printf("Enter an integer... :");
    int number;
	scanf("%d", &number);
	printf("Is it Odd:");
    if(isOdd(number)==1)
    printf("YES");
    else printf("NO");
    
    printf("\nperfect Square:");
    if(isPerfectSquare(number)==1)
    printf("YES");
    else printf("NO");
    
	printf("\ndivisors:");
    showDivisors(number);
    
    printf("\nfactorial: %d",factorial(number));
    
    printf("\nis it prime:");
    if(isPrime(number)==1)
    printf("YES");
    else printf("NO");
    
    return 0;
}