### BAB Number 1500

This is BAB number 1500 and it was created on the 1162nd day of BABbling. This BAB has BABid 3.167, which implies it was 167th BAB created during the 3rd year of BABbling.

The following information about the number 1500 was obtained from MathBabbler's Number Analyst software.

```   1500 proper divisors are: 1,2,3,4,5,6,10,12,15,20,25,30,50,60,
75,100,125,150,250,300,375,500,750
1500 is abundant (sum of divisors is 2868)
1500 is unhappy
1500 is not prime
1500 has the prime factors: 2*2*3*5*5*5
1500 in octal is 02734
1500 in binary is 10111011100 (is odious)
1500 nearest square numbers: -56...21 (1444...1521 [39])
sqrt(1500) = 38.7298
ln(1500) = 7.31322
log(1500) = 3.17609
```
##### Exercises
1. No or Yes: The difference between ln(1500) and log(1500) is within five percent of the value of Pi.

2. 1500 written in scientific notation is ____________________.

3. A number is odious if its binary representation has an (even | odd) number of ones.

4. No or Yes: 1500 written as a Roman numeral is MD.

5. As of this BAB's create date (4/15/2008), MathBabbler had been BABbling at a rate of ________ BABs per day.

6. A Harshad number is a number that is evenly divisible by the sum of its digits. Show that 1500 is a Harshad number.

##### @Compufoo's Tweet Count Hits 1500

@Compufoo's tweet count hit `1500` on 13 September 2011. This nBAB about the number `1500` was created on 15 April 2008 and since that time significant changes had been made to the MBNA.

```   MathBabbler Number Analyst (MBNA) output:
=========================================
1500 is a natural, whole, integer
1500 is even
1500 proper divisors are: 1,2,3,4,5,6,10,12,15,20,25,30,50,60,
75,100,125,150,250,300,375,500,750,
1500 is abundant (sum of divisors is 2868)
1500 is unhappy
1500 is not prime
1500 has the prime factors: 2*2*3*5*5*5 (sum=22)
1500 sum of prime factors is: 22
1500 in octal is 02734
1500 in binary is 10111011100 (is odious)
1500 nearest square numbers: -56...21 (1444...1521 [39])
sqrt(1500) = 38.7298
ln(1500) = 7.31322
log(1500) = 3.17609
1500 reciprocal is .00066666666666666666666666666666
1500! is 4.812e+4114
1500 is 477.465 Pi years
1500 is 75 scoreyears
1500 written as a Roman numeral is MD
1500 = 376^2 - 374^2 and 2 * (376 + 374) = 1500
```

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 15 April 2008