678

Names of 678

• Cardinal: 678 can be written as Six hundred seventy-eight.

Scientific notation

• Scientific notation: 6.78 × 10²

Factors of 678

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 118

Divisors of 678

• Number of divisors d(n): 8
• Complete list of divisors:
  1 2 3 6 113 226 339 678
• Sum of all divisors σ(n): 1368
• Sum of proper divisors (its aliquot sum) s(n): 690
• 678 is an abundant number, because the sum of its proper divisors (690) is greater than itself. Its abundance is 12

Bases of 678

• Binary: 1010100110₂
• Hexadecimal: 0x2A6
• Base-36: IU

Squares and roots of 678

• 678 squared (678²) is 459684
• 678 cubed (678³) is 311665752
• The square root of 678 is 26.0384331327
• The cube root of 678 is 8.7850296435

Scales and comparisons

• 678 seconds is equal to 11 minutes, 18 seconds.
• To count from 1 to 678 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 678 cubic inches would be around 0.7 feet tall.

Recreational maths with 678

• 678 backwards is 876
• The number of decimal digits it has is: 3
• The sum of 678's digits is 21
• More coming soon!