GDT uses FreeFind.com as the search engine on his Learning About Computing website. GDT received the following email message from FreeFind.com on 4 December 2011.

Our search engine has finished indexing your site: Site URL: http://shell.deru.com/gdt/ Pages Read:8400This was the first time that FreeFind indexed 8400 pages. In addition, rarely does FreeFind index count equal a number that is a multiple of both 10 and 100.

MathBabbler Number Analyst (MBNA) output: ========================================= 8400 is a natural, whole, integer 8400 is even 8400 proper divisors are: 1,2,3,4,5,6,7,8,10,12,14,15,16,20,21,24,25, 28,30,35,40,42,48,50,56,60,70,75,80,84,100, 105,112,120,140,150,168,175,200,210,240,280, 300,336,350,400,420,525,560,600,700,840,1050, 1200,1400,1680,2100,2800,4200, 8400 is refactorable (evenly divisable by # of divisors) 8400 is abundant (sum of divisors is 22352) 8400 is unhappy 8400 is not a Squarefree Number: 4,16,25,100,400, 8400 is a Harshad number 8400 is not prime 8400 has the prime factors: 2*2*2*2*3*5*5*7 (sum=28) 8400 sum of prime factors is: 28 8400 is pentagonal 8400 in octal is 020320 8400 in hexadecimal is 0x20d0 8400 in binary is 10000011010000 (is evil) 8400 nearest square numbers: -119...64 (8281...8464 [92]) sqrt(8400) = 91.6515 ln(8400) = 9.03599 log(8400) = 3.92428 8400 reciprocal is .00011904761904761904761904761904 8400 is an apocalyptic power 8400! is inf 8400 is 2673.8 Pi years 8400 is 420 scoreyears 8400 = 2101^2 - 2099^2 and 2 * (2101 + 2099) = 8400Note: This nBAB for the number

`was the 468th nBAB and it was the first nBAB created using a version of the MBNA that checked for`

8400Squarefree Numbers.

**Creator:** Gerald Thurman
[gthurman@gmail.com]

**Created:** 06 December 2011

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