Can start by understanding that the numbers will be close to the cube root of 190740 which should lie between 50 and 60 (between 125000 and 216000). Can start with the smallest prime numbers and check. It will be satisfied for 53 * 59 * 61. Total of 53 + 59 + 61 = 173.
Top scorer in 5 national level aptitude tests including CAT, CET, and IIFT. Director of Learning Roots, a prep institute. A doctor who is saving lives by not practising and a firm believer in the notion 'Hard work won't go unrewarded forever.'