Wiktionary
n. (context set phrase English) A number which represents a particularly noteworthy quantity of something and which is expressed, for simplicity, impressiveness, or memorability, in a very round off form usually ending in one or more zeros.
Usage examples of "nice round number".
Vijay Misra called me-he'd been wondering too, but unlike me, he'd put two and two together and come up with a nice round number.
Vijay Misra called mehe'd been wondering too, but unlike me, he'd put two and two together and come up with a nice round number.
Including the training Burke had given us in the Congo, I had jumped nine times in all, so this would make ten-a nice round number.
I finally settled on the year 2000, a nice round number and only thirty years away.
That's a nice round number, and there's no point in spoiling things for a few riyals.
Exactly twenty were in each book, front and back, a nice round number, but not so much as to distort the spines.
A hundred years sounds like a nice round number, but 1952s really a better spot to draw the line.
Let us further suppose that half of the 52 flies were female, that half of all subsequent generations were female, and finally that each female deposited 1,000 eggs, a nice round number.