### About the Number 14 (fourteen)

MathBabbler noticed he didn't have a nBAB for the number `14` even though Pi Day occurs every March `14`th.

```   MathBabbler Number Analyst (MBNA) output:
=========================================
14 is a natural, whole, integer
14 is even
14 proper divisors are: 1,2,7,
14 is deficient (sum of divisors is 10)
14 is unhappy
14 is not a Harshad number
14 is not prime
14 is undulating
14 has the prime factors: 2*7
14 is semiprime (biprime or 2-almost prime)
14 in octal is 016
14 in hexadecimal is 0xe
14 in binary is 1110 (is odious)
14 nearest square numbers: -5...2 (9...16 )
sqrt(14) = 3.74166
ln(14) = 2.63906
log(14) = 1.14613
14 reciprocal is .07142857142857142857142857142857
14! is 8.71783e+10
14 is 4.45634 Pi years
14 is 0 score and 14 years
14 written as a Roman numeral is XIV
```

`[Wikipedia]` `14` is a square pyramidal number because if the sum of the first three square numbers.

```   1^2 + 2^2 + 3^2 = 14

generalized:  n(n+1)(2n+1)/6
```

The first few square pyramidal numbers are...

```   1, 5, 14, 30, 55, 91, 140, 204, 285, 385, 506, 650, 819
```

OEIS.org::id:A000330

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 17 March 2009 