About the Number 220 (two hundred twenty)

This nBAB was the 220th BAB of the Spring 2009 semester. 220 BABs was a new record for BABs created during spring semesters and it was created with 24 days left in the semester.

   MathBabbler Number Analyst (MBNA) output:
   =========================================
   220 is a natural, whole, integer
   220 is even
   220 proper divisors are: 1,2,4,5,10,11,20,22,44,55,110,
   220 is abundant (sum of divisors is 284)
   220 is unhappy
   220 is a Harshad number
   220 is not prime
   220 has the prime factors: 2*2*5*11 (sum=20)
   220 sum of prime factors is: 20
   220 in octal is 0334
   220 in hexadecimal is 0xdc
   220 in binary is 11011100 (is odious)
   220 nearest square numbers: -24...5 (196...225 [15])
   sqrt(220) = 14.8324
   ln(220) = 5.39363
   log(220) = 2.34242
   220 reciprocal is .00454545454545454545454545454545
   220 is an apocalyptic power
   220! is 2.28386e+421
   220 is 70.0282 Pi years
   220 is 11 scoreyears
   220 written as a Roman numeral is CCXX

[Wikipedia] 220 is the sum of four consecutive prime numbers (47 + 53 + 59 + 61).

[Wikipedia] 220 is an amicable number with 284 because the sum of the proper divisors for 220 equals the sum of the proper divisors for 284. 220 and 284 is the first (smallest) amicable pair.

OEIS.org::id:A063990

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 20 April 2009