81442

Names of 81442

• Cardinal: 81442 can be written as Eighty-one thousand, four hundred forty-two.

Scientific notation

• Scientific notation: 8.1442 × 10⁴

Factors of 81442

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 992

Divisors of 81442

• Number of divisors d(n): 8
• Complete list of divisors:
  1 2 43 86 947 1894 40721 81442
• Sum of all divisors σ(n): 125136
• Sum of proper divisors (its aliquot sum) s(n): 43694
• 81442 is a deficient number, because the sum of its proper divisors (43694) is less than itself. Its deficiency is 37748

Bases of 81442

• Binary: 10011111000100010₂
• Hexadecimal: 0x13E22
• Base-36: 1QUA

Squares and roots of 81442

• 81442 squared (81442²) is 6632799364
• 81442 cubed (81442³) is 540188445802888
• The square root of 81442 is 285.3804478235
• The cube root of 81442 is 43.3460449229

Scales and comparisons

• 81,442 seconds is equal to 22 hours, 37 minutes, 22 seconds.
• To count from 1 to 81,442 would take you about twenty-two hours.

  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 81442 cubic inches would be around 3.6 feet tall.

Recreational maths with 81442

• 81442 backwards is 24418
• The number of decimal digits it has is: 5
• The sum of 81442's digits is 19
• More coming soon!