This nBAB was the
220
th 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 for220
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