Home 28
28
Binary Visual
1 1 1 0 0
3 ones, 2 zeros
Parity:
Even
Prime:
No
Square:
784
Cube:
21,952
Square root:
5.2915
Cube root:
3.0366
Prime factors:
2 × 2 × 7
Number of divisors:
6
Sum of divisors:
28
Type:
Perfect
Divisors:
1, 2, 4, 7, 14, 28
Binary:
11100
Octal:
34
Hexadecimal:
1C
Roman:
XXVIII
Base64:
Mjg=
Area:
2,463.01 u²
Perimeter:
175.93 u
Diameter:
56 u
Area:
784 u²
Perimeter:
112 u
Diagonal:
39.60 u
Cubo:
21,952 u³
Sphere:
91,952.32 u³
Cylinder:
68,964.24 u³
Eq. triangle:
339.48 u²
Hexagon:
2,036.89 u²
Cube surf.:
4,704 u²
Sum of digits:
10
Numerological reduction:
1
Product of digits:
16
Unique Digits:
2
Meanings:
Leadership
Independence
Pioneer
General fact: 28 is the number of days in the shortest month of the Gregorian calendar, February (except in leap years, when there are twenty-nine).
Mathematical fact: 28 is the sum of the totient function for the first nine integers.
Trivia: 28 is the number of days in the average human menstrual cycle.
Historical date: January 28th is the day in 2002 that TAME Flight 120, a Boeing 727-100 crashes in the Andes mountains in southern Colombia killing 92.
Day of the year:
28 January
Weeks:
4 weeks
Months:
0.9 months
Years:
0.08 years
Seconds:
00:00:28
Minutes:
0.47 min
Hours:
0.01 h
Days:
0 days
Percentage:
28%
Angle:
28°
Temperature:
28°C = 82.4°F
Frequency:
28 Hz
Dice (d6):
4 dados + 4
Chess:
d4
Cards:
2♦
Programmatically generated for number 28
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