### About the Number 158 (one hundred fifty-eight)

On 21 January 2014, the number 158 was the smallest number that didn't have a nBAB. Now 159 is the smallest number not having a nBAB.

```MathBabbler Number Analyst (MBNA) output:
=========================================
158 is a natural, whole, integer
158 is even
158 proper divisors are: 1,2,79,
158 has 3 proper divisors
158 is deficient (sum of divisors is 82; ratio: 0.518987)
158 is unhappy
158 is a Squarefree Number
158 is composite (not prime)
158 has the prime factors: 2*79 (sum=81)
158 is semiprime (biprime or 2-almost prime)
158 is the sum of 10 consecutive primes
158 = 3 + 5 + 7 + 11 + 13 + 17 + 19 + 23 + 29 + 31
158 in octal is 0236
158 in hexadecimal is 0x9e
158 in binary is 10011110 (is odious)
158 nearest square numbers: -14...11 (144...169 )
sqrt(158) = 12.5698
ln(158) = 5.0626
log(158) = 2.19866
158 reciprocal is .00632911392405063291139240506329
158 is 50.293 Pi years
158 is 7 score and 18 years
158 written as a Roman numeral is CLVIII
```

`log5(158)` = 3.14557, which when rounded down the nearest hundredth (3.14) is Pi (3.14159265358979) rounded to the nearest hundredth.

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 21 January 2014 