2, 3, 4, 5 and 6 are multiples of 2, 3, 4, 5 and 6.
Itself and any of its other multiples
4 is not prime.
120, 180, 240 and so on.
Simply rearranging the digits, the largest number is 5432. Much larger numbers are possible if other operations are allowed.
There are 52.
2345
2345 + 2345 = 4690
514 441 3877
2345-3456 = -1111
2345
No; 2345 is odd.
The factors of 2345 are: 1, 5, 7, 35, 67, 335, 469, 2345.