### About the Number 305 (three hundred five)

The number `305` was the smallest number that didn't have a nBAB on 26 April 2016. After this nBAB for `305` was posted, the number 306 was the smallest number without a nBAB.

```MathBabbler Number Analyst (MBNA) output:
=========================================
305 is a natural, whole, integer
305 is odd
305 proper divisors are: 1,5,61,
305 has 3 proper divisors
305 is deficient (sum of divisors is 67; ratio: 0.219672)
305 is unhappy
305 is a Squarefree Number
305 is composite (not prime)
305 has the prime factors: 5*61 (sum=66)
305 is semiprime (biprime or 2-almost prime)
305 is a 61-smooth number
305 is Arithmetic (A003601)
305 in octal is 0461
305 in hexadecimal is 0x131
305 in binary is 100110001 (is evil)
305 nearest square numbers: -16...19 (289...324 )
sqrt(305) = 17.4642
ln(305) = 5.72031
log(305) = 2.4843
305 reciprocal is .00327868852459016393442622950819
305! is 7.81614e+626
305 is 97.0845 Pi years
305 is 15 score and 5 years
305 written as a Roman numeral is CCCV
305 is 153^2 - 152^2 and 153 + 152 = 305
305 is a multiple of 5 & it contains a 5 (A121025)
```

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 26 April 2016 