About the Number 445 (four hundred forty-five)

445 was the smallest number without a nBAB on 31 December 2017.

MathBabbler Number Analyst (MBNA) output:
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445 is natural, counting, whole, integer
445 is odd (not even)
445 is not extremely odd
445 proper divisors are: 1,5,89,
445 has 3 proper divisors
445 is deficient (sum of divisors is 95; ratio: 0.213483)
445 is unhappy
445 is a Squarefree Number
445 is composite (not prime)
445 has the prime factors: 5*89 (sum=94)
445 is semiprime (biprime or 2-almost prime)
445 is a 89-smooth number
445 in octal is 0675
445 in hexadecimal is 0x1bd
445 in binary is 110111101 (is odious)
445 nearest square numbers: -4...39 (441...484 [22])
sqrt(445) = 21.095
ln(445) = 6.09807
log(445) = 2.64836
445! is 9.60532e+986
445 is 141.648 Pi years
445 is 22 score and 5 years
445 written as a Roman numeral is CDXLV
445 is 223^2 - 222^2 and 223 + 222 = 445
445 is a multiple of 5 & it contains a 5 (A121025)
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445 reciprocal is 0.002247191011235955056179775280898876404494382
remainders: 
1,10,100,110,210,320,85,405,45,5,50,55,105,160,265,425,245,225,25,250,275,80,355,435,345,335,235,125,360,40,400,440,395,390,340,285,180,20,200,220,420,195,170,365,90,10

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 31 December 2017

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