18939690

Names of 18939690

• Cardinal: 18939690 can be written as Eighteen million, nine hundred thirty-nine thousand, six hundred ninety.

Scientific notation

• Scientific notation: 1.893969 × 10⁷

Factors of 18939690

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 939

Divisors of 18939690

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 3 5 6 7 9 10 11 14 15 18 21 22 27 30 33 35 42 45 54 55 63 66 70 77 90 99 105 110 126 135 154 165 189 198 210 231 270 297 315 330 378 385 462 495 594 630 693 770 911 945 990 1155 1386 1485 1822 1890 2079 2310 2733 2970 3465 4158 4555 5466 6377 6930 8199 9110 10021 10395 12754 13665 16398 19131 20042 20790 24597 27330 30063 31885 38262 40995 49194 50105 57393 60126 63770 70147 81990 90189 95655 100210 114786 122985 140294 150315 172179 180378 191310 210441 245970 270567 286965 300630 344358 350735 420882 450945 541134 573930 631323 701470 860895 901890 1052205 1262646 1352835 1721790 1893969 2104410 2705670 3156615 3787938 6313230 9469845 18939690
• Sum of all divisors σ(n): 63037440
• Sum of proper divisors (its aliquot sum) s(n): 44097750
• 18939690 is an abundant number, because the sum of its proper divisors (44097750) is greater than itself. Its abundance is 25158060

Bases of 18939690

• Binary: 1001000001111111100101010₂
• Hexadecimal: 0x120FF2A
• Base-36: B9XYI

Squares and roots of 18939690

• 18939690 squared (18939690²) is 358711857296100
• 18939690 cubed (18939690³) is 6793891376512372209000
• The square root of 18939690 is 4351.9754135335
• The cube root of 18939690 is 266.5575299933

Scales and comparisons

• 18,939,690 seconds is equal to 31 weeks, 2 days, 5 hours, 1 minute, 30 seconds.
• To count from 1 to 18,939,690 would take you about forty-six 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 18939690 cubic inches would be around 22.2 feet tall.

Recreational maths with 18939690

• 18939690 backwards is 09693981
• 18939690 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 18939690's digits is 45
• More coming soon!