138424778920

Names of 138424778920

• Cardinal: 138424778920 can be written as One hundred thirty-eight billion, four hundred twenty-four million, seven hundred seventy-eight thousand, nine hundred twenty.

Scientific notation

• Scientific notation: 1.3842477892 × 10¹¹

Factors of 138424778920

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 4442454

Divisors of 138424778920

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 4 5 8 10 19 20 38 40 41 76 82 95 152 164 190 205 328 380 410 760 779 820 1558 1640 3116 3895 6232 7790 15580 31160 4442387 8884774 17769548 22211935 35539096 44423870 84405353 88847740 168810706 177695480 182137867 337621412 364275734 422026765 675242824 728551468 844053530 910689335 1457102936 1688107060 1821378670 3376214120 3460619473 3642757340 6921238946 7285514680 13842477892 17303097365 27684955784 34606194730 69212389460 138424778920
• Sum of all divisors σ(n): 335844532800
• Sum of proper divisors (its aliquot sum) s(n): 197419753880
• 138424778920 is an abundant number, because the sum of its proper divisors (197419753880) is greater than itself. Its abundance is 58994974960

Bases of 138424778920

• Binary: 10000000111010110000101000000010101000₂
• Hexadecimal: 0x203AC280A8
• Base-36: 1RLAJEZS

Squares and roots of 138424778920

• 138424778920 squared (138424778920²) is 19161419419050876366400
• 138424778920 cubed (138424778920³) is 2652415246875512397251172916288000
• The square root of 138424778920 is 372054.8063390661
• The cube root of 138424778920 is 5172.9460157731

Scales and comparisons

• 138,424,778,920 seconds is equal to 4,401 years, 24 weeks, 6 days, 15 hours, 28 minutes, 40 seconds.
• To count from 1 to 138,424,778,920 would take you about eight thousand, eight hundred 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 138424778920 cubic inches would be around 431.1 feet tall.

Recreational maths with 138424778920

• 138424778920 backwards is 029877424831
• The number of decimal digits it has is: 12
• The sum of 138424778920's digits is 55
• More coming soon!