### About the Number 6,400 (six thousand four hundred)

@nanofoo tweeted tweet# 6400 on 3 August 2014. It took @nanofoo 2481 days to tweet 6400 tweets.

```MathBabbler Number Analyst (MBNA) output:
=========================================
6400 is a natural, whole, integer
6400 is even
6400 proper divisors are: 1,2,4,5,8,10,16,20,25,32,40,50,64,80,100,128,
160,200,256,320,400,640,800,1280,1600,3200,
6400 has 26 proper divisors
6400 is abundant (sum of divisors is 9441; ratio: 1.47516)
6400 is unhappy
6400 is not a Squarefree Number: 4,16,25,64,100,256,400,1600,6400,
6400 is composite (not prime)
6400 has the prime factors: 2*2*2*2*2*2*2*2*5*5 (sum=26)
6400 is powerful (80^2*1^3)
6400 is not in A038853
6400 in octal is 014400
6400 in binary is 1100100000000 (is odious)
6400 nearest square numbers: 6400 is square (not odd square/not centered octagonal
sqrt(6400) = 80
ln(6400) = 8.76405
log(6400) = 3.80618
6400 is 80^2
6400 reciprocal is .00015625000000000000000000000000
6400 is 2037.18 Pi years
6400 is 320 scoreyears
6400 is 1601^2 - 1599^2 and 2 * (1601 + 1599)
6400 is a multiple of 4 & it contains a 4 (A121024)
6400 is a multiple of 40 & it contains a 40
6400 is a multiple of 64 & it contains a 64
6400 is a multiple of 400 & it contains a 400
6400 is a multiple of 640 & it contains a 640
```

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 03 August 2014