681720030

Names of 681720030

• Cardinal: 681720030 can be written as Six hundred eighty-one million, seven hundred twenty thousand and thirty.

Scientific notation

• Scientific notation: 6.8172003 × 10⁸

Factors of 681720030

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 3940

Divisors of 681720030

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 3 5 6 9 10 15 18 27 30 45 54 90 135 270 809 1618 2427 3121 4045 4854 6242 7281 8090 9363 12135 14562 15605 18726 21843 24270 28089 31210 36405 43686 46815 56178 72810 84267 93630 109215 140445 168534 218430 280890 421335 842670 2524889 5049778 7574667 12624445 15149334 22724001 25248890 37873335 45448002 68172003 75746670 113620005 136344006 227240010 340860015 681720030
• Sum of all divisors σ(n): 1820750400
• Sum of proper divisors (its aliquot sum) s(n): 1139030370
• 681720030 is an abundant number, because the sum of its proper divisors (1139030370) is greater than itself. Its abundance is 457310340

Bases of 681720030

• Binary: 101000101000100011100011011110₂
• Hexadecimal: 0x28A238DE
• Base-36: B9VMJI

Squares and roots of 681720030

• 681720030 squared (681720030²) is 464742199303200900
• 681720030 cubed (681720030³) is 316824066051244096644027000
• The square root of 681720030 is 26109.7688614817
• The cube root of 681720030 is 880.1067492747

Scales and comparisons

• 681,720,030 seconds is equal to 21 years, 35 weeks, 1 day, 6 hours, 40 minutes, 30 seconds.
• To count from 1 to 681,720,030 would take you about thirty-two years!

  This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 681720030 cubic inches would be around 73.3 feet tall.

Recreational maths with 681720030

• 681720030 backwards is 030027186
• 681720030 is a Harshad number.
• The number of decimal digits it has is: 9
• The sum of 681720030's digits is 27
• More coming soon!