18000

Names of 18000

• Cardinal: 18000 can be written as Eighteen thousand.

Scientific notation

• Scientific notation: 1.8 × 10⁴

Factors of 18000

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 10

Divisors of 18000

• Number of divisors d(n): 60
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 25 30 36 40 45 48 50 60 72 75 80 90 100 120 125 144 150 180 200 225 240 250 300 360 375 400 450 500 600 720 750 900 1000 1125 1200 1500 1800 2000 2250 3000 3600 4500 6000 9000 18000
• Sum of all divisors σ(n): 62868
• Sum of proper divisors (its aliquot sum) s(n): 44868
• 18000 is an abundant number, because the sum of its proper divisors (44868) is greater than itself. Its abundance is 26868

Bases of 18000

• Binary: 100011001010000₂
• Hexadecimal: 0x4650
• Base-36: DW0

Squares and roots of 18000

• 18000 squared (18000²) is 324000000
• 18000 cubed (18000³) is 5832000000000
• The square root of 18000 is 134.1640786499
• The cube root of 18000 is 26.2074139423

Scales and comparisons

• 18,000 seconds is equal to 5 hours.
• To count from 1 to 18,000 would take you about five 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 18000 cubic inches would be around 2.2 feet tall.

Recreational maths with 18000

• 18000 backwards is 00081
• 18000 is a Harshad number.
• The number of decimal digits it has is: 5
• The sum of 18000's digits is 9
• More coming soon!