`received the following tweet from`

@MathBabbler`on`

@MAAnow`2013.02.25`

.Today's number is489http://bit.ly/139xb7DThe MAA (Mathematical Association of America) reported that

489was anoctahedral number(OEIS.org A005900).This nBAB for the number

489was the first nBAB created using a MBNA that checked for octahedral numbers.MathBabbler Number Analyst (MBNA) output: ========================================= 489 is a natural, whole, integer 489 is odd 489 proper divisors are: 1,3,163, 489 is deficient (sum of divisors is 167) 489 is unhappy 489 is a Squarefree Number 489 is not a Harshad number 489 is not prime 489 has the prime factors: 3*163 (sum=166) 489 is semiprime (biprime or 2-almost prime) 3...163...answer: 166 489 is an octahedral number 489 is a lucky number 489 in octal is 0751 489 in hexadecimal is 0x1e9 489 in binary is 111101001 (is evil) 489 nearest square numbers: -5...40 (484...529 [23]) sqrt(489) = 22.1133 ln(489) = 6.19236 log(489) = 2.68931 489 reciprocal is .00204498977505112474437627811860 489! is 2.79157e+1104 489 is 155.654 Pi years 489 is 24 score and 9 years 489 written as a Roman numeral is CDLXXXIX 489 = 245^2 - 244^2 and 245 + 244 = 489This C++ program was added to the MBNA (MathBabbler Number Analyst) on 25 February 2013.

**Creator:** Gerald Thurman
[gthurman@gmail.com]

**Created:** 25 February 2013

This work is licensed under a Creative Commons Attribution 3.0 United States License.