About the Number 144 (one hundred forty-four)

MathBabbler created a nBAB for the number 7777 and that prompted the creation of a nBAB for 777 and that prompted the creation a nBAB for 77. The nBAB for 7777 was the 142nd nBAB and the nBAB for 777 was the 143rd nBAB. MathBabbler has used the number 144; therefore, he delayed posting the nBAB for 77 so that he could make this nBAB about the number 144 nBAB #144.

   MathBabbler Number Analyst (MBNA) output:
   =========================================
   144 is a natural, whole, integer
   144 is even
   144 proper divisors are: 1,2,3,4,6,8,9,12,16,18,24,36,48,72,
   144 is abundant (sum of divisors is 259)
   144 is unhappy
   144 is a Harshad number
   144 is not prime
   144 has the prime factors: 2*2*2*2*3*3
   144 is a Fibonacci number
   144 in octal is 0220
   144 in hexadecimal is 0x90
   144 in binary is 10010000 (is evil)
   144 nearest square numbers: 144 is square (144 is square)
   sqrt(144) = 12
   ln(144) = 4.96981
   log(144) = 2.15836
   144 is 12^2
   144 reciprocal is .00694444444444444444444444444444
   144! is 5.55029e+249
   144 is 45.8366 Pi years
   144 is 7 score and 4 years
   144 written as a Roman numeral is CXLIV

MathBabbler was a bit surprised on 29 March 2009 that he didn't have a nBAB for the number 144.

[Wikipedia] 144 is a sum-product number. A sum-product number is an "integer that in a given base is equal to the sum of its digits times the product of its digits."

   sum_digits(144) = 9
   multiply_digits(144) = 16
   9 * 16 = 144

OEIS.org::id:A038369


Creator: Gerald Thurman [gthurman@gmail.com]
Created: 29 March 2009

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