248

Additionally, 248 is: a nontotient. a refactorable number. an untouchable number. palindromic in bases 13 (16113), 30 (8830), 61 (4461) and 123 (22123). a Harshad number in bases 3, 4, 6, 7, 9, 11, 13 (and 18 other bases). part of the 43-aliquot tree. The aliquot sequence starting at 248 is: 248, 232, 218, 112, 136, 134, 70, 74, 40, 50, 43, 1, 0.