139991390

Names of 139991390

• Cardinal: 139991390 can be written as One hundred thirty-nine million, nine hundred ninety-one thousand, three hundred ninety.

Scientific notation

• Scientific notation: 1.3999139 × 10⁸

Factors of 139991390

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 953

Divisors of 139991390

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 5 7 10 11 14 22 35 55 70 77 110 154 281 385 562 647 770 1294 1405 1967 2810 3091 3235 3934 4529 6182 6470 7117 9058 9835 14234 15455 19670 21637 22645 30910 35585 43274 45290 49819 71170 99638 108185 181807 216370 249095 363614 498190 909035 1272649 1818070 1999877 2545298 3999754 6363245 9999385 12726490 13999139 19998770 27998278 69995695 139991390
• Sum of all divisors σ(n): 315767808
• Sum of proper divisors (its aliquot sum) s(n): 175776418
• 139991390 is an abundant number, because the sum of its proper divisors (175776418) is greater than itself. Its abundance is 35785028

Bases of 139991390

• Binary: 1000010110000001100101011110₂
• Hexadecimal: 0x858195E
• Base-36: 2BCI1Q

Squares and roots of 139991390

• 139991390 squared (139991390²) is 19597589274132100
• 139991390 cubed (139991390³) is 2743493763134843722619000
• The square root of 139991390 is 11831.7957216983
• The cube root of 139991390 is 519.2387653539

Scales and comparisons

• 139,991,390 seconds is equal to 4 years, 23 weeks, 3 days, 6 hours, 29 minutes, 50 seconds.
• To count from 1 to 139,991,390 would take you about six years!

  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 139991390 cubic inches would be around 43.3 feet tall.

Recreational maths with 139991390

• 139991390 backwards is 093199931
• The number of decimal digits it has is: 9
• The sum of 139991390's digits is 44
• More coming soon!