Numbers / 610

The Number 610

610 is composite: factorization 2 × 5 × 61. That gives 610 exactly 8 divisors: 1, 2, 5, 10, 61, 122, 305, 610. 610's proper divisors total just 506, 104 short of 610, the deficient case most of 610's neighbors share too. 610 is also a Fibonacci number, since 377 + 233 = 610. 610 has a digit sum of 7; for 610, the digital root works out to 7. 610: 2, 5, 10 all divide 610 evenly, out of 2-12. 610 is 1001100010 in binary and 262 in hex; as a Roman numeral it's DCX.