### About the Number 428 (four hundred twenty-eight)

428 was the smallest number without a nBAB on 7 May 2017.

```MathBabbler Number Analyst (MBNA) output:
=========================================
428 is natural, counting, whole, integer
428 is even (not odd)
428 proper divisors are: 1,2,4,107,214,
428 has 5 proper divisors
428 is deficient (sum of divisors is 328; ratio: 0.766355)
428 is unhappy
428 is not a Squarefree Number: 4,
428 is composite (not prime)
428 has the prime factors: 2*2*107 (sum=111)
428 is a 107-smooth number
428 in octal is 0654
428 in binary is 110101100 (is odious)
428 nearest square numbers: -28...13 (400...441 [21])
sqrt(428) = 20.6882
ln(428) = 6.05912
log(428) = 2.63144
428! is 1.24392e+942
428 is 136.237 Pi years
428 is 21 score and 8 years
428 written as a Roman numeral is CDXXVIII
428 is 108^2 - 106^2 and 2 * (108 + 106)
428 is a multiple of 2 & it contains a 2 (A121022)
428 is a multiple of 4 & it contains a 4 (A121024)
_____________________________________________________
428 reciprocal is 0.0023364485981308411214953271028037383177570093457943925
remainders:
1,10,100,144,156,276,192,208,368,256,420,348,56,132,36,360,176,48,52,92,64,212,408,228,140,116,304,44,12,120,344,16,160,316,164,356,136,76,332,324,244,300,4,40,400,148,196,248,340,404,188,168,396,108,224,100
```

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 07 May 2017