864

Names of 864

• Cardinal: 864 can be written as Eight hundred sixty-four.

Scientific notation

• Scientific notation: 8.64 × 10²

Factors of 864

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 5

Divisors of 864

• Number of divisors d(n): 24
• Complete list of divisors:
  1 2 3 4 6 8 9 12 16 18 24 27 32 36 48 54 72 96 108 144 216 288 432 864
• Sum of all divisors σ(n): 2520
• Sum of proper divisors (its aliquot sum) s(n): 1656
• 864 is an abundant number, because the sum of its proper divisors (1656) is greater than itself. Its abundance is 792

Bases of 864

• Binary: 1101100000₂
• Hexadecimal: 0x360
• Base-36: O0

Squares and roots of 864

• 864 squared (864²) is 746496
• 864 cubed (864³) is 644972544
• The square root of 864 is 29.3938769133
• The cube root of 864 is 9.5244063119

Scales and comparisons

• 864 seconds is equal to 14 minutes, 24 seconds.
• To count from 1 to 864 would take you about seven 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 864 cubic inches would be around 0.8 feet tall.

Recreational maths with 864

• 864 backwards is 468
• 864 is a Harshad number.
• The number of decimal digits it has is: 3
• The sum of 864's digits is 18
• More coming soon!