872

Names of 872

• Cardinal: 872 can be written as Eight hundred seventy-two.

Scientific notation

• Scientific notation: 8.72 × 10²

Factors of 872

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 111

Divisors of 872

• Number of divisors d(n): 8
• Complete list of divisors:
  1 2 4 8 109 218 436 872
• Sum of all divisors σ(n): 1650
• Sum of proper divisors (its aliquot sum) s(n): 778
• 872 is a deficient number, because the sum of its proper divisors (778) is less than itself. Its deficiency is 94

Bases of 872

• Binary: 1101101000₂
• Hexadecimal: 0x368
• Base-36: O8

Squares and roots of 872

• 872 squared (872²) is 760384
• 872 cubed (872³) is 663054848
• The square root of 872 is 29.5296461205
• The cube root of 872 is 9.5537123621

Scales and comparisons

• 872 seconds is equal to 14 minutes, 32 seconds.
• To count from 1 to 872 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 872 cubic inches would be around 0.8 feet tall.

Recreational maths with 872

• 872 backwards is 278
• The number of decimal digits it has is: 3
• The sum of 872's digits is 17
• More coming soon!