Compare 640 vs 644

Property	640	644
Type	composite number	composite number
Unique factors	2	3
Total factors	8	4
Prime factorization	2⁷ × 5¹	2² × 7¹ × 23¹
Prime factorization	2 × 2 × 2 × 2 × 2 × 2 × 2 × 5	2 × 2 × 7 × 23
Divisors count	16	12
Divisors	1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640	1, 2, 4, 7, 14, 23, 28, 46, 92, 161, 322, 644
Number of properties	0	0
Roman numberals	DCXL	DCXLIV
Base 2	1010000000₂	1010000100₂
Base 3	212201₃	212212₃
Base 4	22000₄	22010₄
Base 5	10030₅	10034₅
Base 6	2544₆	2552₆
Base 7	1603₇	1610₇
Base 8	1200₈	1204₈
Base 9	781₉	785₉
Base 10	640₁₀	644₁₀
Base 11	532₁₁	536₁₁
Base 12	454₁₂	458₁₂
Base 13	3a3₁₃	3a7₁₃
Base 14	33a₁₄	340₁₄
Base 15	2ca₁₅	2ce₁₅
Base 16	280₁₆	284₁₆