### About the Number 399 (three hundred ninety-nine)

nBAB number 399 was about the number 7810 and it was posted on 19 December 2010. This nBAB for the number 399 was the 400th nBAB.

```   MathBabbler Number Analyst (MBNA) output:
=========================================
399 is a natural, whole, integer
399 is odd
399 proper divisors are: 1,3,7,19,21,57,133,
399 is deficient (sum of divisors is 241)
399 is unhappy
399 is a Harshad number
399 is not prime
399 has the prime factors: 3*7*19 (sum=29)
399 is sphenic (had 3 unique prime factors)
399 sum of prime factors is: 29
399 is a lucky number
399 is ThurmNumber
399 is the sum of 11 consecutive primes
399 = 17 + 19 + 23 + 29 + 31 + 37 + 41 + 43 + 47 + 53 + 59
399 in octal is 0617
399 in hexadecimal is 0x18f
399 in binary is 110001111 (is evil)
399 nearest square numbers: -38...1 (361...400 )
sqrt(399) = 19.975
ln(399) = 5.98896
log(399) = 2.60097
399 reciprocal is .00250626566416040100250626566416
399! is 1.60086e+866
399 is 127.006 Pi years
399 is 19 score and 19 years
399 written as a Roman numeral is CCCXCIX
399 = 200^2 - 199^2 and 200 + 199 = 399
```

```log9(399) = 2.72569, which when rounded down to the nearest hundredth equals e (2.7182818284590) rounded up to the nearest hundredth. ```

``` ```
``` Creator: Gerald Thurman [gthurman@gmail.com] Created: 19 December 2010 <!-- document.writeln("<b>URL:</b> " + document.URL + "<br />"); document.writeln("<b>Last Modified:</b> " + document.lastModified + "<br />"); //--> This work is licensed under a Creative Commons Attribution 3.0 United States License. ```