Strong Number

int number = int.Parse(Console.ReadLine());
int numberCopy = number;
int sum = 0;

while (numberCopy > 0)
{
    int digit = numberCopy % 10;
    numberCopy = numberCopy / 10;
    int factorial = 1;

    for (int i = 1; i <= digit; i++)
    {
        factorial *= i;
    }
    sum += factorial;
}
if (sum == number)
{
    Console.WriteLine("yes");
}
else
{
    Console.WriteLine("no");
}