MathBabbler held off creating this nBAB about the number `48` until 4 August 2009 because U.S. President Barack Obama was born on 4 August 1961 (i.e. `48` years ago).

```   MathBabbler Number Analyst (MBNA) output:
=========================================
48 is a natural, whole, integer
48 is even
48 proper divisors are: 1,2,3,4,6,8,12,16,24,
48 is abundant (sum of divisors is 76)
48 is unhappy
48 is not prime
48 has the prime factors: 2*2*2*2*3 (sum=11)
48 sum of prime factors is: 11
48 is undulating
48 in octal is 060
48 in binary is 110000 (is evil)
48 nearest square numbers: -12...1 (36 [6]...49 [7])
sqrt(48) = 6.9282
ln(48) = 3.8712
log(48) = 1.68124
48 reciprocal is .02083333333333333333333333333333
48! is 1.24139e+61
48 is 15.2789 Pi years
48 is 2 score and 8 years
48 written as a Roman numeral is XLVIII
```

`48` in base-9 is 44 in base-10. Obama is the 44th President of the United States.

`[NumberGossip.com]` `48` is equal to the difference of the squares of its digits (i.e. `48` = 8^2 - 4^2).

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 04 August 2009