138889478540

Names of 138889478540

• Cardinal: 138889478540 can be written as One hundred thirty-eight billion, eight hundred eighty-nine million, four hundred seventy-eight thousand, five hundred forty.

Scientific notation

• Scientific notation: 1.3888947854 × 10¹¹

Factors of 138889478540

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 54144

Divisors of 138889478540

• Number of divisors d(n): 48
• Complete list of divisors:
  1 2 4 5 10 20 23 46 92 115 230 460 6317 12634 25268 31585 47797 63170 95594 126340 145291 191188 238985 290582 477970 581164 726455 955940 1099331 1452910 2198662 2905820 4397324 5496655 10993310 21986620 301933649 603867298 1207734596 1509668245 3019336490 6038672980 6944473927 13888947854 27777895708 34722369635 69444739270 138889478540
• Sum of all divisors σ(n): 304403666112
• Sum of proper divisors (its aliquot sum) s(n): 165514187572
• 138889478540 is an abundant number, because the sum of its proper divisors (165514187572) is greater than itself. Its abundance is 26624709032

Bases of 138889478540

• Binary: 10000001010110011101010100000110001100₂
• Hexadecimal: 0x205675418C
• Base-36: 1RSZ7JIK

Squares and roots of 138889478540

• 138889478540 squared (138889478540²) is 19290287249113120531600
• 138889478540 cubed (138889478540³) is 2679217936916132388106091591864000
• The square root of 138889478540 is 372678.7873491057
• The cube root of 138889478540 is 5178.7281719785

Scales and comparisons

• 138,889,478,540 seconds is equal to 4,416 years, 13 weeks, 2 days, 2 hours, 42 minutes, 20 seconds.
• To count from 1 to 138,889,478,540 would take you about eight thousand, eight hundred thirty-two 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 138889478540 cubic inches would be around 431.6 feet tall.

Recreational maths with 138889478540

• 138889478540 backwards is 045874988831
• The number of decimal digits it has is: 12
• The sum of 138889478540's digits is 65
• More coming soon!