Problem 34—Digit factorials

题目描述如下：

145 is a curious number, as 1! + 4! + 5! = 1 + 24 + 120 = 145.
Find the sum of all numbers which are equal to the sum of the factorial of their digits.
Note: as 1! = 1 and 2! = 2 are not sums they are not included.

public class Problem34{    public static void main(String[] args)    {        int sum = 0;        for (int i = 3; i < 1000000; i++)        {            if (isCurious(i))            {                System.out.println(i);                sum += i;            }        }        System.err.println("sum = " + sum);    }    public static boolean isCurious(int num)    {        int temp = num;        int sum = 0;        while (temp > 0)        {            sum += MathUtils.getFactorial(temp % 10);            temp = temp / 10;        }        if (sum == num)        {            return true;        }        return false;    }}

运行结果：

145
40585
sum = 40730