720 (number) Article Index for
720
 

Information About

720 (number)






720
Cardinal Seven hundred and twenty
Ordinal 720th
Factorization 2^4 \cdot 3^2 \cdot 5
Roman Numeral DCCXX
Binary 1011010000
Hexadecimal 2D0


It is 6! ( 6 Factorial ), a Composite Number with thirty Divisor s, more than any number below, making it a Highly Composite Number . It is a Harshad Number in every base from binary to decimal.

There are 49 solutions to the equation φ (''x'') = 720, more than any integer below it, making 720 a Highly Totient Number .

720 is a 241- Gonal Number .


DIVISORS

1 , 2 , 3 , 4 , 5 , 6 , 8 , 9 , 10 , 12 , 15 , 16 , 18 , 20 , 24 , 30 , 36 , 40 , 45 , 48 , 60 , 72 , 80 , 90 , 120 , 144 , 180 , 240 , 360 , 720


FACTORS

2, 2, 2, 2, 3, 3, 5


IN OTHER FIELDS


720 is

For the year AD, see 720 .