Numbers / 429

The Number 429

429 is composite: factorization 3 × 11 × 13. That gives 429 exactly 8 divisors: 1, 3, 11, 13, 33, 39, 143, 429. 429's proper divisors total just 243, 186 short of 429, the deficient case most of 429's neighbors share too. 429 has a digit sum of 15; for 429, the digital root works out to 6. 429: 3, 11 all divide 429 evenly, out of 2-12. 429 is 110101101 in binary and 1AD in hex; as a Roman numeral it's CDXXIX.