### About the Number 8,558 (eight thousand five hundred fifty-eight)

MathBabbler observed that the digits of his mother's (Betty's) age, 85, reversed (58) would equal his age on his next birthday.

85 concatentated (appended) with 58 is the palindromic number 8558.

```MathBabbler Number Analyst (MBNA) output:
=========================================
8558 is a natural, whole, integer
8558 is even
8558 proper divisors are: 1,2,11,22,389,778,4279,
8558 has 7 proper divisors
8558 is deficient (sum of divisors is 5482; ratio: 0.64057)
8558 is unhappy
8558 is a Squarefree Number
8558 is composite (not prime)
8558 has the prime factors: 2*11*389 (sum=402)
8558 is sphenic (had 3 unique prime factors)
8558 is palindromic
8558 is Arithmetic (A003601)
8558 in octal is 020556
8558 in binary is 10000101101110 (is odious)
8558 nearest square numbers: -94...91 (8464...8649 [93])
sqrt(8558) = 92.5095
ln(8558) = 9.05462
log(8558) = 3.93237
8558 reciprocal is .00011684973124561813507828931993
8558 is an apocalyptic power
8558! is inf
8558 is 2724.1 Pi years
8558 is 427 score and 18 years
```

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 18 April 2015