Numbers / 618

The Number 618

618 is composite: factorization 2 × 3 × 103. That gives 618 exactly 8 divisors: 1, 2, 3, 6, 103, 206, 309, 618. 618's proper divisors total 630, 12 more than 618 itself, so 618 is abundant. 618 has a digit sum of 15; for 618, the digital root works out to 6. 618: 2, 3, 6 all divide 618 evenly, out of 2-12. 618 is 1001101010 in binary and 26A in hex; as a Roman numeral it's DCXVIII.