428
Number 428: Properties, Factors, and Mathematical Facts
Short answer
The number 428 is an even composite number with 6 positive divisors. Its prime factorization is 2² × 107. It is also a deficient number, which gives it several notable mathematical relationships.
Is 428 prime?
ClassificationCompositeParityEvenDivisor count6AbundanceDeficient
What is the prime factorization of 428?
Prime factorization
2 squared times 107
What are the divisors of 428?
Divisor count
6
Divisor sum
756
Proper divisor sum
328
- 1
- 2
- 4
- 107
- 214
- 428
How is 428 classified?
How is 428 represented in other numeral systems?
Decimal
428
Binary
110101100
Octal
654
Hexadecimal
1AC
Roman
CDXXVIIILearn more →
In words
four hundred twenty eight
Roots and powers
Square root
20.688161 Approximate
Cube root
7.536122 Approximate
Nearest lower square
400
Nearest higher square
441
Nearest lower cube
343
Nearest higher cube
512
What are the digit properties of 428?
Which numbers are related to 428?
Why these results are true
- 428 is composite because it has positive divisors other than 1 and itself.
Compare this number
FAQ for 428
- Is 428 prime?
- No
- What is the prime factorization of 428?
- 2² × 107
- Is 428 a perfect square?
- No
- What is 428 in binary?
- 110101100
- What is 428 in Roman numerals?
- CDXXVIII