30139890

Names of 30139890

• Cardinal: 30139890 can be written as Thirty million, one hundred thirty-nine thousand, eight hundred ninety.

Scientific notation

• Scientific notation: 3.013989 × 10⁷

Factors of 30139890

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 63

Divisors of 30139890

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 3 5 6 10 11 15 19 22 23 30 33 38 46 55 57 66 69 95 110 114 115 121 138 165 190 209 230 242 253 285 330 345 361 363 418 437 506 570 605 627 690 722 726 759 874 1045 1083 1210 1254 1265 1311 1518 1805 1815 2090 2166 2185 2299 2530 2622 2783 3135 3610 3630 3795 3971 4370 4598 4807 5415 5566 6270 6555 6897 7590 7942 8303 8349 9614 10830 11495 11913 13110 13794 13915 14421 16606 16698 19855 22990 23826 24035 24909 27830 28842 34485 39710 41515 41745 43681 48070 49818 52877 59565 68970 72105 83030 83490 87362 91333 105754 119130 124545 131043 144210 158631 182666 218405 249090 262086 264385 273999 317262 436810 456665 528770 547998 655215 793155 913330 1004663 1310430 1369995 1586310 2009326 2739990 3013989 5023315 6027978 10046630 15069945 30139890
• Sum of all divisors σ(n): 87562944
• Sum of proper divisors (its aliquot sum) s(n): 57423054
• 30139890 is an abundant number, because the sum of its proper divisors (57423054) is greater than itself. Its abundance is 27283164

Bases of 30139890

• Binary: 1110010111110010111110010₂
• Hexadecimal: 0x1CBE5F2
• Base-36: HY036

Squares and roots of 30139890

• 30139890 squared (30139890²) is 908412969212100
• 30139890 cubed (30139890³) is 27379466966626080669000
• The square root of 30139890 is 5489.9808742837
• The cube root of 30139890 is 311.2054693473

Scales and comparisons

• 30,139,890 seconds is equal to 49 weeks, 5 days, 20 hours, 11 minutes, 30 seconds.
• To count from 1 to 30,139,890 would take you about twenty-two 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 30139890 cubic inches would be around 25.9 feet tall.

Recreational maths with 30139890

• 30139890 backwards is 09893103
• 30139890 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 30139890's digits is 33
• More coming soon!