Consider the form <math><mstyle displaystyle="true"><msup><mrow><mi>x</mi></mrow><mrow><mn>2</mn></mrow></msup><mo>+</mo><mi>b</mi><mi>x</mi><mo>+</mo><mi>c</mi></mstyle></math> . Find a pair of integers whose product is <math><mstyle displaystyle="true"><mi>c</mi></mstyle></math> and whose sum is <math><mstyle displaystyle="true"><mi>b</mi></mstyle></math> . In this case, whose product is <math><mstyle displaystyle="true"><mo>-</mo><mn>21</mn></mstyle></math> and whose sum is <math><mstyle displaystyle="true"><mn>4</mn></mstyle></math> .

Write the factored form using these integers.

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Name | one billion twenty-nine million seven hundred thirty-three thousand six hundred eighty-nine |
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- 1029733689 has 4 divisors, whose sum is
**1372978256** - The reverse of 1029733689 is
**9863379201** - Previous prime number is
**3**

- Is Prime? no
- Number parity odd
- Number length 10
- Sum of Digits 48
- Digital Root 3

Name | one hundred thirty-eight million six hundred forty thousand ninety-six |
---|

- 138640096 has 128 divisors, whose sum is
**1203199920** - The reverse of 138640096 is
**690046831** - Previous prime number is
**7**

- Is Prime? no
- Number parity even
- Number length 9
- Sum of Digits 37
- Digital Root 1

Name | four hundred eighteen million forty-three thousand two hundred forty-six |
---|

- 418043246 has 16 divisors, whose sum is
**648777600** - The reverse of 418043246 is
**642340814** - Previous prime number is
**449**

- Is Prime? no
- Number parity even
- Number length 9
- Sum of Digits 32
- Digital Root 5