About the Number 489 (four hundred eighty-nine)

@MathBabbler received the following tweet from @MAAnow on 2013.02.25.

   Today's number is 489 http://bit.ly/139xb7D

The MAA (Mathematical Association of America) reported that 489 was an octahedral number (OEIS.org A005900).

This nBAB for the number 489 was 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 = 489

This C++ program was added to the MBNA (MathBabbler Number Analyst) on 25 February 2013.


Creator: Gerald Thurman [gthurman@gmail.com]
Created: 25 February 2013

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