### About the Number 72 (Seventy-Two)

Let's see what we can say about the `number 72`...

```   72 is an even, whole, natural, integer number
72 proper divisors are: 1,2,3,4,6,8,9,12,18,24,36
72 is abundant (sum of divisors is 123)
72 is unhappy
72 is undulating
72 is not prime
72 has the prime factors: 2*2*2*3*3
72 in octal (base-8) is 0110
72 in hexadecimal (base-16) is 0x48
72 in binary (base-2) is 1001000 (is evil)
728 is 58
7216 is 114
72 in Roman numeral is LXXII
72 nearest square numbers: -8...9 (64...81 [9])
72 split into squares sum is { 36, 36 }
sqrt(72) = 8.48528
ln(72) = 4.27667
log(72) = 1.85733

observe...
72 = 2 * 36 = 2 * 62 = 2 * (2 * 3)2 =
2 * 2 * 3 * 2 * 3 = 23 * 32 = 8 * 9
```

From the Wikipedia we learn that the `number 72` is the sum of six consecutive prime numbers: ```5 + 7 + 11 + 13 + 17 + 19```. The `number 72` is also the sum of four consecutive primes: `13 + 17 + 19 + 23`.

At the Maricopa County Community Colleges, the 72nd day of the year typically occurs during Spring Break.

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 07 January 2007
``` + added output from MathBabbler's Number Analyst on 25 May 2008 ```