869

Names of 869

• Cardinal: 869 can be written as Eight hundred sixty-nine.

Scientific notation

• Scientific notation: 8.69 × 10²

Factors of 869

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 90

Divisors of 869

• Number of divisors d(n): 4
• Complete list of divisors:
  1 11 79 869
• Sum of all divisors σ(n): 960
• Sum of proper divisors (its aliquot sum) s(n): 91
• 869 is a deficient number, because the sum of its proper divisors (91) is less than itself. Its deficiency is 778

Bases of 869

• Binary: 1101100101₂
• Hexadecimal: 0x365
• Base-36: O5

Squares and roots of 869

• 869 squared (869²) is 755161
• 869 cubed (869³) is 656234909
• The square root of 869 is 29.4788059459
• The cube root of 869 is 9.5427436815

Scales and comparisons

• 869 seconds is equal to 14 minutes, 29 seconds.
• To count from 1 to 869 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 869 cubic inches would be around 0.8 feet tall.

Recreational maths with 869

• 869 backwards is 968
• The number of decimal digits it has is: 3
• The sum of 869's digits is 23
• More coming soon!