Complete Number Analysis
28
It's a perfect number!
It's a triangular number!
It's a happy number!
Number Visualizations
Binary Visual
11100
3 ones, 2 zeros
Mathematical Properties
Basic Properties
Parity:
Even
Prime:
No
Square:
784
Cube:
21,952
Square root:
5.2915
Cube root:
3.0366
Divisors and Factors
Prime factors:
2 × 2 × 7
Number of divisors:
6
Sum of divisors:
28
Type:
Perfect
Divisors:
1, 2, 4, 7, 14, 28
Conversions
Binary:
11100
Octal:
34
Hexadecimal:
1C
Roman:
XXVIII
Base64:
Mjg=
Geometry and Measures
Circle (radius 28)
Area:
2,463.01 u²
Perimeter:
175.93 u
Diameter:
56 u
Square (side 28)
Area:
784 u²
Perimeter:
112 u
Diagonal:
39.60 u
3D Volumes
Cubo:
21,952 u³
Sphere:
91,952.32 u³
Cylinder:
68,964.24 u³
More Measures
Eq. triangle:
339.48 u²
Hexagon:
2,036.89 u²
Cube surf.:
4,704 u²
Numerology and Symbolism
Numerological Analysis
Sum of digits:
10
Numerological reduction:
1
Product of digits:
16
Unique Digits:
2
Meanings:
Leadership
Independence
Pioneer
Number Curiosities
General fact: 28 is the number of dominoes in standard domino sets.
Mathematical fact: 28 is a composite number, its proper divisors being 1, 2, 4, 7, and 14.
Trivia: 28 is the number of dominoes in standard domino sets.
Historical date: January 28th is the day in 1965 that the current design of the Flag of Canada is chosen by an act of Parliament.
More Interesting Properties
In the calendar
Day of the year:
28 January
Weeks:
4 weeks
Months:
0.9 months
Years:
0.08 years
In time
Seconds:
00:00:28
Minutes:
0.47 min
Hours:
0.01 h
Days:
0 days
Representations
Percentage:
28%
Angle:
28°
Temperature:
28°C = 82.4°F
Frequency:
28 Hz
Games
Dice (d6):
4 dados + 4
Chess:
d4
Cards:
2♦
Programmatically generated for number 28
Try another number:
Random number