Fatto generale: 1738 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 1738 is 6952 / 4, and this equation uses each digit 1-9 exactly once.
Trivia: 1738 is a boring number.
Data storica: October 3rd is the day in 1283 that Dafydd ap Gruffydd, prince of Gwynedd in Wales, becomes the first nobleman executed by being hanged, drawn and quartered.