856

Names of 856

• Cardinal: 856 can be written as Eight hundred fifty-six.

Scientific notation

• Scientific notation: 8.56 × 10²

Factors of 856

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 109

Divisors of 856

• Number of divisors d(n): 8
• Complete list of divisors:
  1 2 4 8 107 214 428 856
• Sum of all divisors σ(n): 1620
• Sum of proper divisors (its aliquot sum) s(n): 764
• 856 is a deficient number, because the sum of its proper divisors (764) is less than itself. Its deficiency is 92

Bases of 856

• Binary: 1101011000₂
• Hexadecimal: 0x358
• Base-36: NS

Squares and roots of 856

• 856 squared (856²) is 732736
• 856 cubed (856³) is 627222016
• The square root of 856 is 29.2574776765
• The cube root of 856 is 9.4949187969

Scales and comparisons

• 856 seconds is equal to 14 minutes, 16 seconds.
• To count from 1 to 856 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 856 cubic inches would be around 0.8 feet tall.

Recreational maths with 856

• 856 backwards is 658
• The number of decimal digits it has is: 3
• The sum of 856's digits is 19
• More coming soon!