18128145

Names of 18128145

• Cardinal: 18128145 can be written as Eighteen million, one hundred twenty-eight thousand, one hundred forty-five.

Scientific notation

• Scientific notation: 1.8128145 × 10⁷

Factors of 18128145

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 172664

Divisors of 18128145

• Number of divisors d(n): 16
• Complete list of divisors:
  1 3 5 7 15 21 35 105 172649 517947 863245 1208543 2589735 3625629 6042715 18128145
• Sum of all divisors σ(n): 33148800
• Sum of proper divisors (its aliquot sum) s(n): 15020655
• 18128145 is a deficient number, because the sum of its proper divisors (15020655) is less than itself. Its deficiency is 3107490

Bases of 18128145

• Binary: 1000101001001110100010001₂
• Hexadecimal: 0x1149D11
• Base-36: ASJRL

Squares and roots of 18128145

• 18128145 squared (18128145²) is 328629641141025
• 18128145 cubed (18128145³) is 5957445785902466648625
• The square root of 18128145 is 4257.7159369785
• The cube root of 18128145 is 262.6945858807

Scales and comparisons

• 18,128,145 seconds is equal to 29 weeks, 6 days, 19 hours, 35 minutes, 45 seconds.
• To count from 1 to 18,128,145 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 18128145 cubic inches would be around 21.9 feet tall.

Recreational maths with 18128145

• 18128145 backwards is 54182181
• The number of decimal digits it has is: 8
• The sum of 18128145's digits is 30
• More coming soon!