### About the Number 287 (two hundred eighty-seven)

287 was the smallest number that didn't have a nBAB on 14 April 2016. MathBabbler is trying to ensure that the numbers 0-300 have nBABs by the end of the Spring 2016 Semester. With the posting of this nBAB for 287, 290 became the smallest number without a nBAB on 14 April 2016.

```MathBabbler Number Analyst (MBNA) output:
=========================================
287 is a natural, whole, integer
287 is odd
287 proper divisors are: 1,7,41,
287 has 3 proper divisors
287 is deficient (sum of divisors is 49; ratio: 0.170732)
287 is unhappy
287 is a Squarefree Number
287 is composite (not prime)
287 has the prime factors: 7*41 (sum=48)
287 is semiprime (biprime or 2-almost prime)
287 is a 41-smooth number
287 is pentagonal
287 is Arithmetic (A003601)
287 is the sum of 9 consecutive primes
287 = 17 + 19 + 23 + 29 + 31 + 37 + 41 + 43 + 47
287 in octal is 0437
287 in hexadecimal is 0x11f
287 in binary is 100011111 (is evil)
287 nearest square numbers: -31...2 (256...289 )
sqrt(287) = 16.9411
ln(287) = 5.65948
log(287) = 2.45788
287 reciprocal is .00348432055749128919860627177700
287 is an apocalyptic power
287! is 2.49888e+582
287 is 91.3549 Pi years
287 is 14 score and 7 years
287 written as a Roman numeral is CCLXXXVII
287 is 144^2 - 143^2 and 144 + 143 = 287
287 is a multiple of 7 & it contains a 7 (A121027)
```

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 14 April 2016 