680

Names of 680

• Cardinal: 680 can be written as Six hundred eighty.

Scientific notation

• Scientific notation: 6.8 × 10²

Factors of 680

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 24

Divisors of 680

• Number of divisors d(n): 16
• Complete list of divisors:
  1 2 4 5 8 10 17 20 34 40 68 85 136 170 340 680
• Sum of all divisors σ(n): 1620
• Sum of proper divisors (its aliquot sum) s(n): 940
• 680 is an abundant number, because the sum of its proper divisors (940) is greater than itself. Its abundance is 260

Bases of 680

• Binary: 1010101000₂
• Hexadecimal: 0x2A8
• Base-36: IW

Squares and roots of 680

• 680 squared (680²) is 462400
• 680 cubed (680³) is 314432000
• The square root of 680 is 26.0768096209
• The cube root of 680 is 8.7936593441

Scales and comparisons

• 680 seconds is equal to 11 minutes, 20 seconds.
• To count from 1 to 680 would take you about five minutes.

  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 680 cubic inches would be around 0.7 feet tall.

Recreational maths with 680

• 680 backwards is 086
• The number of decimal digits it has is: 3
• The sum of 680's digits is 14
• More coming soon!