### About the Number 345 (three hundred forty-five)

345 was the smallest number that didn't have a nBAB on 17 July 2016.

```MathBabbler Number Analyst (MBNA) output:
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345 is natural, counting, whole, integer
345 is odd (not even)
345 proper divisors are: 1,3,5,15,23,69,115,
345 has 7 proper divisors
345 is deficient (sum of divisors is 231; ratio: 0.669565)
345 is unhappy
345 is a Squarefree Number
345 is composite (not prime)
345 has the prime factors: 3*5*23 (sum=31)
345 is sphenic (has 3 unique prime factors)
345 is a 23-smooth number
345 is Arithmetic (A003601)
345 is a ThurmNumber
345 in octal is 0531
345 in hexadecimal is 0x159
345 in binary is 101011001 (is odious)
345 nearest square numbers: -21...16 (324...361 [19])
sqrt(345) = 18.5742
ln(345) = 5.84354
log(345) = 2.53782
345! is 2.42156e+727
345 is 109.817 Pi years
345 is 17 score and 5 years
345 written as a Roman numeral is CCCXLV
345 is 173^2 - 172^2 and 173 + 172 = 345
345 is a multiple of 3 & it contains a 3 (A121023)
345 is a multiple of 5 & it contains a 5 (A121025)
______________________
345 reciprocal is 0.00289855072463768115942
```

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 17 July 2016