Numbers / 878

The Number 878

878 is composite: factorization 2 × 439. That gives 878 exactly 4 divisors: 1, 2, 439, 878. 878's proper divisors total just 442, 436 short of 878, the deficient case most of 878's neighbors share too. 878 is also a palindrome, since 878 reads identically forwards and backwards. 878 has a digit sum of 23; for 878, the digital root works out to 5. 878: 2 all divide 878 evenly, out of 2-12. 878 is 1101101110 in binary and 36E in hex; as a Roman numeral it's DCCCLXXVIII.