81200

Names of 81200

• Cardinal: 81200 can be written as Eighty-one thousand, two hundred.

Scientific notation

• Scientific notation: 8.12 × 10⁴

Factors of 81200

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 43

Divisors of 81200

• Number of divisors d(n): 60
• Complete list of divisors:
  1 2 4 5 7 8 10 14 16 20 25 28 29 35 40 50 56 58 70 80 100 112 116 140 145 175 200 203 232 280 290 350 400 406 464 560 580 700 725 812 1015 1160 1400 1450 1624 2030 2320 2800 2900 3248 4060 5075 5800 8120 10150 11600 16240 20300 40600 81200
• Sum of all divisors σ(n): 230640
• Sum of proper divisors (its aliquot sum) s(n): 149440
• 81200 is an abundant number, because the sum of its proper divisors (149440) is greater than itself. Its abundance is 68240

Bases of 81200

• Binary: 10011110100110000₂
• Hexadecimal: 0x13D30
• Base-36: 1QNK

Squares and roots of 81200

• 81200 squared (81200²) is 6593440000
• 81200 cubed (81200³) is 535387328000000
• The square root of 81200 is 284.9561369757
• The cube root of 81200 is 43.3030689403

Scales and comparisons

• 81,200 seconds is equal to 22 hours, 33 minutes, 20 seconds.
• To count from 1 to 81,200 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 81200 cubic inches would be around 3.6 feet tall.

Recreational maths with 81200

• 81200 backwards is 00218
• The number of decimal digits it has is: 5
• The sum of 81200's digits is 11
• More coming soon!