21728
Number 21728: Properties, Factors, and Mathematical Facts
Short answer
The number 21728 is an even composite number with 24 positive divisors. Its prime factorization is 2⁵ × 7 × 97. It is also an abundant number, which gives it several notable mathematical relationships.
Is 21728 prime?
ClassificationCompositeParityEvenDivisor count24AbundanceAbundant
What is the prime factorization of 21728?
Prime factorization
2 to the power of 5 times 7 times 97
What are the divisors of 21728?
Divisor count
24
Divisor sum
49,392
Proper divisor sum
27,664
- 1
- 2
- 4
- 7
- 8
- 14
- 16
- 28
- 32
- 56
- 97
- 112
- 194
- 224
- 388
- 679
- 776
- 1358
- 1552
- 2716
- 3104
- 5432
- 10864
- 21728
How is 21728 classified?
How is 21728 represented in other numeral systems?
Decimal
21728
Binary
101010011100000
Octal
52340
Hexadecimal
54E0
Roman
No conventional Roman numeral
In words
twenty one thousand seven hundred twenty eight
Roots and powers
Square root
147.404206 Approximate
Cube root
27.904436 Approximate
Nearest lower square
21609
Nearest higher square
21904
Nearest lower cube
19683
Nearest higher cube
21952
What are the digit properties of 21728?
Which numbers are related to 21728?
Why these results are true
- 21728 is composite because it has positive divisors other than 1 and itself.
- 21728 is abundant because the sum of its proper divisors (27664) is greater than 21728.
Compare this number
FAQ for 21728
- Is 21728 prime?
- No
- What is the prime factorization of 21728?
- 2⁵ × 7 × 97
- Is 21728 a perfect square?
- No
- What is 21728 in binary?
- 101010011100000