MathBabbler received from a former student a picture of road signs from Ohio. The road signs contained the number

`, which is a large number for doing road sign math with. When MathBabbler has road signs with numbers such as`

670`, he uses his MBNA to find the number's proper divisors and the nearest square numbers.`

670MathBabbler Number Analyst (MBNA) output: ========================================= 670 is a natural, whole, integer 670 is even 670 proper divisors are: 1,2,5,10,67,134,335, 670 is deficient (sum of divisors is 554) 670 is unhappy 670 is not a Harshad number 670 is not prime 670 has the prime factors: 2*5*67 670 is sphenic (had 3 unique prime factors) 670 sum prime factors: 2...5...67...answer: 74 670 in octal is 01236 670 in hexadecimal is 0x29e 670 in binary is 1010011110 (is evil) 670 nearest square numbers: -45...6 (625...676 [26]) sqrt(670) = 25.8844 ln(670) = 6.50728 log(670) = 2.82607 670 reciprocal is .00149253731343283582089552238805 670! is 2.01835e+1604 670 is 213.268 Pi years 670 is 33 score and 10 years 670 written as a Roman numeral is DCLXXThe road signs received from the student contains the numbers 71 and 4. 67 is a proper divisor of

`; therefore, when doing road sign math, the difference between 71 and 4 can be divided into`

670`resulting in the number 10 (which could be common log'd into 1). The road signs also contain the number 40 and 5; therefore, the sum of 40 and 5 can be subtracted from`

670`resulting in the square 625, which can then be square-rooted down to 25 (which could be square-rooted down to 5).`

670BARS::Student Submitted Road Signs from Columbus, Ohio was created after the number

`was processed by the MBNA.`

670

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

**Created:** 10 April 2009

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