18900

Names of 18900

• Cardinal: 18900 can be written as Eighteen thousand, nine hundred.

Scientific notation

• Scientific notation: 1.89 × 10⁴

Factors of 18900

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 17

Divisors of 18900

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 3 4 5 6 7 9 10 12 14 15 18 20 21 25 27 28 30 35 36 42 45 50 54 60 63 70 75 84 90 100 105 108 126 135 140 150 175 180 189 210 225 252 270 300 315 350 378 420 450 525 540 630 675 700 756 900 945 1050 1260 1350 1575 1890 2100 2700 3150 3780 4725 6300 9450 18900
• Sum of all divisors σ(n): 69440
• Sum of proper divisors (its aliquot sum) s(n): 50540
• 18900 is an abundant number, because the sum of its proper divisors (50540) is greater than itself. Its abundance is 31640

Bases of 18900

• Binary: 100100111010100₂
• Hexadecimal: 0x49D4
• Base-36: EL0

Squares and roots of 18900

• 18900 squared (18900²) is 357210000
• 18900 cubed (18900³) is 6751269000000
• The square root of 18900 is 137.4772708487
• The cube root of 18900 is 26.6371200523

Scales and comparisons

• 18,900 seconds is equal to 5 hours, 15 minutes.
• To count from 1 to 18,900 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 18900 cubic inches would be around 2.2 feet tall.

Recreational maths with 18900

• 18900 backwards is 00981
• 18900 is a Harshad number.
• The number of decimal digits it has is: 5
• The sum of 18900's digits is 18
• More coming soon!