Number 28
The number 28 is the 7th triangular number. It has 6 divisors and a digital root of 1. Explore its full properties below, or find words and phrases with a gematria value of 28.
28
Divisors: 6
1, 2, 4, 7, 14, 28
Sum: 56
Prev Triangular: 21
7th Triangular Number
Next Triangular: 36
Mathematical Properties
Golden Number514,229
Reduced Digit Sum1
Magic Constant10,990
Digital Root1
Octal2(34)
Duodecimal32(24)
Hexadecimal40(1c)
Binary11100
28th Values
Prime107
Triangular406
Square784
Star4,537
Pentagonal1,162
Cube21,952
Tetrahedral4,060
Square Pyramidal7,714
Fibonacci317,811
Harshad72
Happy Number219