### About the Number 350 (three hundred fifty)

October 24th is "International Day of Climate Action" and its website is `350`.org.

The `350`.org FAQ says `350` is used because it is the number that "leading scientists say is the safe upper limit for carbon dioxide--measured in 'Parts Per Million' in our atmosphere."

```   MathBabbler Number Analyst (MBNA) output:
=========================================
350 is a natural, whole, integer
350 is even
350 proper divisors are: 1,2,5,7,10,14,25,35,50,70,175,
350 is abundant (sum of divisors is 394)
350 is unhappy
350 is not a Harshad number
350 is not prime
350 has the prime factors: 2*5*5*7 (sum=19)
350 sum of prime factors is: 19
350 in octal is 0536
350 in binary is 101011110 (is evil)
350 nearest square numbers: -26...11 (324...361 [19])
sqrt(350) = 18.7083
ln(350) = 5.85793
log(350) = 2.54407
350 reciprocal is .00285714285714285714285714285714
350! is 1.23587e+740
350 is 111.408 Pi years
350 is 17 score and 10 years
350 written as a Roman numeral is CCCL
```

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 24 October 2009