### 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 not prime
1800 has the prime factors: 2*2*2*3*3*5*5
1800 in octal is 03410
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 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 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