in the various iterations I did in my testing I used both
topic #CHANNEL $int
topic #CHANNEL $round

with rounding if the math gives 108.6793 (whatever)
$int will return 108 and round (with no decimals) will give 109
depending on when you have it update and the actual time you set in
the topic (ie: oct 31 2066 00:00:01) the division will be different for the number of "days" and the remainder

If I have rambled I mean that if you test at noon and the time in the topic is 1 second after midninght you have half a day not accounted for in the use of $int and rounded up in the use of $round