18129930

Names of 18129930

• Cardinal: 18129930 can be written as Eighteen million, one hundred twenty-nine thousand, nine hundred thirty.

Scientific notation

• Scientific notation: 1.812993 × 10⁷

Factors of 18129930

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 288

Divisors of 18129930

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 3 5 6 7 10 13 14 15 21 26 29 30 35 39 42 58 65 70 78 87 91 105 130 145 174 182 195 203 210 229 273 290 377 390 406 435 455 458 546 609 687 754 870 910 1015 1131 1145 1218 1365 1374 1603 1885 2030 2262 2290 2639 2730 2977 3045 3206 3435 3770 4809 5278 5655 5954 6090 6641 6870 7917 8015 8931 9618 11310 13195 13282 14885 15834 16030 17862 19923 20839 24045 26390 29770 33205 39585 39846 41678 44655 46487 48090 62517 66410 79170 86333 89310 92974 99615 104195 125034 139461 172666 199230 208390 232435 258999 278922 312585 431665 464870 517998 604331 625170 697305 863330 1208662 1294995 1394610 1812993 2589990 3021655 3625986 6043310 9064965 18129930
• Sum of all divisors σ(n): 55641600
• Sum of proper divisors (its aliquot sum) s(n): 37511670
• 18129930 is an abundant number, because the sum of its proper divisors (37511670) is greater than itself. Its abundance is 19381740

Bases of 18129930

• Binary: 1000101001010010000001010₂
• Hexadecimal: 0x114A40A
• Base-36: ASL56

Squares and roots of 18129930

• 18129930 squared (18129930²) is 328694361804900
• 18129930 cubed (18129930³) is 5959205770917510657000
• The square root of 18129930 is 4257.9255512515
• The cube root of 18129930 is 262.7032077307

Scales and comparisons

• 18,129,930 seconds is equal to 29 weeks, 6 days, 20 hours, 5 minutes, 30 seconds.
• To count from 1 to 18,129,930 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 18129930 cubic inches would be around 21.9 feet tall.

Recreational maths with 18129930

• 18129930 backwards is 03992181
• The number of decimal digits it has is: 8
• The sum of 18129930's digits is 33
• More coming soon!