23+45= = 68
2345 + 2345 = 4690
No; 2345 is odd.
2345-3456 = -1111
2345
The factors of 2345 are: 1, 5, 7, 35, 67, 335, 469, 2345.
6790 + 2345 = 9135
2345 + 1234 = 3579
263 + 2345 = 2608
2345 + 4567 = 6912
567 + 2345 = 2912
It is: 567*2345 = 1,329,615
576 + 2345 = 2921