18138750

Names of 18138750

• Cardinal: 18138750 can be written as Eighteen million, one hundred thirty-eight thousand, seven hundred fifty.

Scientific notation

• Scientific notation: 1.813875 × 10⁷

Factors of 18138750

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 708

Divisors of 18138750

• Number of divisors d(n): 80
• Complete list of divisors:
  1 2 3 5 6 7 10 14 15 21 25 30 35 42 50 70 75 105 125 150 175 210 250 350 375 525 625 691 750 875 1050 1250 1382 1750 1875 2073 2625 3455 3750 4146 4375 4837 5250 6910 8750 9674 10365 13125 14511 17275 20730 24185 26250 29022 34550 48370 51825 72555 86375 103650 120925 145110 172750 241850 259125 362775 431875 518250 604625 725550 863750 1209250 1295625 1813875 2591250 3023125 3627750 6046250 9069375 18138750
• Sum of all divisors σ(n): 51883392
• Sum of proper divisors (its aliquot sum) s(n): 33744642
• 18138750 is an abundant number, because the sum of its proper divisors (33744642) is greater than itself. Its abundance is 15605892

Bases of 18138750

• Binary: 1000101001100011001111110₂
• Hexadecimal: 0x114C67E
• Base-36: ASRY6

Squares and roots of 18138750

• 18138750 squared (18138750²) is 329014251562500
• 18138750 cubed (18138750³) is 5967907255529296875000
• The square root of 18138750 is 4258.9611409357
• The cube root of 18138750 is 262.7458015089

Scales and comparisons

• 18,138,750 seconds is equal to 29 weeks, 6 days, 22 hours, 32 minutes, 30 seconds.
• To count from 1 to 18,138,750 would take you about forty-four 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 18138750 cubic inches would be around 21.9 feet tall.

Recreational maths with 18138750

• 18138750 backwards is 05783181
• The number of decimal digits it has is: 8
• The sum of 18138750's digits is 33
• More coming soon!