There might be more, but the numbers 5, 15, and 75 all do that.
78 is an even number as it can be divided by 2!
78
38142
78
78 over 10 as a mixed number = 74/5
3.9
39
The number, which when written out in full, comprises 1 followed by 78 zeros. Alternatively, it is a googol divided by ten sextillion.
312
No: It can be divided by 2 and yield a quotient that is an integer.
11.1429
0.42