18189840

Names of 18189840

• Cardinal: 18189840 can be written as Eighteen million, one hundred eighty-nine thousand, eight hundred forty.

Scientific notation

• Scientific notation: 1.818984 × 10⁷

Factors of 18189840

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 4018

Divisors of 18189840

• Number of divisors d(n): 80
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 15 16 19 20 24 30 38 40 48 57 60 76 80 95 114 120 152 190 228 240 285 304 380 456 570 760 912 1140 1520 2280 3989 4560 7978 11967 15956 19945 23934 31912 39890 47868 59835 63824 75791 79780 95736 119670 151582 159560 191472 227373 239340 303164 319120 378955 454746 478680 606328 757910 909492 957360 1136865 1212656 1515820 1818984 2273730 3031640 3637968 4547460 6063280 9094920 18189840
• Sum of all divisors σ(n): 59371200
• Sum of proper divisors (its aliquot sum) s(n): 41181360
• 18189840 is an abundant number, because the sum of its proper divisors (41181360) is greater than itself. Its abundance is 22991520

Bases of 18189840

• Binary: 1000101011000111000010000₂
• Hexadecimal: 0x1158E10
• Base-36: ATVDC

Squares and roots of 18189840

• 18189840 squared (18189840²) is 330870279225600
• 18189840 cubed (18189840³) is 6018477439868987904000
• The square root of 18189840 is 4264.9548649429
• The cube root of 18189840 is 262.9922554549

Scales and comparisons

• 18,189,840 seconds is equal to 30 weeks, 12 hours, 44 minutes.
• To count from 1 to 18,189,840 would take you about forty-five weeks!

  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 18189840 cubic inches would be around 21.9 feet tall.

Recreational maths with 18189840

• 18189840 backwards is 04898181
• The number of decimal digits it has is: 8
• The sum of 18189840's digits is 39
• More coming soon!