About the Number 1800 (one thousand eight hundred)

This is BAB #1800 and it was created on 24 September 2008 (the 1322nd day of BABbling).

   MathBabbler Number Analyst (MBNA) output:
   =========================================
   1800 is a natural, whole, integer
   1800 is even
   1800 proper divisors are: 1,2,3,4,5,6,8,9,10,12,15,18,20,24,25,
                             30,36,40,45,50,60,72,75,90,100,120,150,
                             180,200,225,300,360,450,600,900
   1800 is abundant (sum of divisors is 4245)
   1800 is unhappy
   1800 is a Harshad number
   1800 is not prime
   1800 has the prime factors: 2*2*2*3*3*5*5
   1800 in octal is 03410
   1800 in hexadecimal is 0x708
   1800 in binary is 11100001000 (is evil)
   1800 nearest square numbers: -36...49 (1764 [42]...1849 [43])
   sqrt(1800) = 42.4264
   ln(1800) = 7.49554
   log(1800) = 3.25527
   1800 reciprocal is .00055555555555555555555555555555
   1800! is inf
   1800 is 572.958 Pi years
   1800 is 90 scoreyears

1800 written as a Roman numeral is MDCCC.

floor(sqrt(1800)) = 42, which is the "Answer to Life, the Universe, and Everything."

Update::2010.06.10

@nanofoo tweeted tweet #1800 on 10 June 2010 (i.e. his 933rd day of tweeting).

Numerous changes were made to the MBNA since this nBAB was created. The following is updated MBNA output for the number 1800.

   MathBabbler Number Analyst (MBNA) output:
   =========================================
   1800 is a natural, whole, integer
   1800 is even
   1800 proper divisors are: 1,2,3,4,5,6,8,9,10,12,15,18,20,24,25,30,
                             36,40,45,50,60,72,75,90,100,120,150,180,
                             200,225,300,360,450,600,900,
   1800 is refactorable (evenly divisable by # of divisors)
   1800 is abundant (sum of divisors is 4245)
   1800 is unhappy
   1800 is a Harshad number
   1800 is not prime
   1800 has the prime factors: 2*2*2*3*3*5*5 (sum=22)
   1800 sum of prime factors is: 22
   1800 is the sum of 10 consecutive primes
   1800 = 157 + 163 + 167 + 173 + 179 + 181 + 191 + 193 + 197 + 199
   1800 in octal is 03410
   1800 in hexadecimal is 0x708
   1800 in binary is 11100001000 (is evil)
   1800 nearest square numbers: -36...49 (1764...1849 [43])
   sqrt(1800) = 42.4264
   ln(1800) = 7.49554
   log(1800) = 3.25527
   1800 reciprocal is .00055555555555555555555555555555
   1800 is an apocalyptic power
   1800! is inf
   1800 is 572.958 Pi years
   1800 is 90 scoreyears
   1800 written as a Roman numeral is MDCCC
   1800 = 451^2 - 449^2 and 2 * (451 + 449) = 1800

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 23 September 2008

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This work is licensed under a Creative Commons Attribution 3.0 United States License.