### About the Number 441 (four hundred forty-one)

`@MathBabbler` received the following tweet from `@wilderlab` on `2014.05.24`.

```   For the 144th day of the year: 144 is the reverse of 441.
The same is true of their square roots... sqrt(144)=12 and
sqrt(441)=21.
```
```MathBabbler Number Analyst (MBNA) output:
=========================================
441 is a natural, whole, integer
441 is odd
441 proper divisors are: 1,3,7,9,21,49,63,147,
441 is refactorable (evenly divisable  by # of divisors)
441 has 8 proper divisors
441 is deficient (sum of divisors is 300; ratio: 0.680272)
441 is unhappy
441 is not a Squarefree Number: 9,49,441,
441 is Harshad (Niven) number
441 is composite (not prime)
441 has the prime factors: 3*3*7*7 (sum=20)
441 is powerful (21^2 * 1^3)
441 in octal is 0671
441 in hexadecimal is 0x1b9
441 in binary is 110111001 (is evil)
441 nearest square numbers: 441 is square (odd square/centered octagonal)
sqrt(441) = 21
ln(441) = 6.08904
log(441) = 2.64444
441 is 21^2
441 reciprocal is .00226757369614512471655328798185
441 is 140.375 Pi years
441 is 22 score and 1 year
441 written as a Roman numeral is CDXLI
441 is 221^2 - 220^2 and 221 + 220 = 441
```

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 12 June 2014 