138644998720

Names of 138644998720

• Cardinal: 138644998720 can be written as One hundred thirty-eight billion, six hundred forty-four million, nine hundred ninety-eight thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 1.3864499872 × 10¹¹

Factors of 138644998720

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 1499213

Divisors of 138644998720

• Number of divisors d(n): 84
• Complete list of divisors:
  1 2 4 5 8 10 16 17 20 32 34 40 64 68 80 85 136 160 170 272 289 320 340 544 578 680 1088 1156 1360 1445 2312 2720 2890 4624 5440 5780 9248 11560 18496 23120 46240 92480 1499189 2998378 5996756 7495945 11993512 14991890 23987024 25486213 29983780 47974048 50972426 59967560 95948096 101944852 119935120 127431065 203889704 239870240 254862130 407779408 433265621 479740480 509724260 815558816 866531242 1019448520 1631117632 1733062484 2038897040 2166328105 3466124968 4077794080 4332656210 6932249936 8155588160 8665312420 13864499872 17330624840 27728999744 34661249680 69322499360 138644998720
• Sum of all divisors σ(n): 350711513460
• Sum of proper divisors (its aliquot sum) s(n): 212066514740
• 138644998720 is an abundant number, because the sum of its proper divisors (212066514740) is greater than itself. Its abundance is 73421516020

Bases of 138644998720

• Binary: 10000001000111111000101100101001000000₂
• Hexadecimal: 0x2047E2CA40
• Base-36: 1ROXNHOG

Squares and roots of 138644998720

• 138644998720 squared (138644998720²) is 19222435670068801638400
• 138644998720 cubed (138644998720³) is 2665094568871971345467901902848000
• The square root of 138644998720 is 372350.6394784359
• The cube root of 138644998720 is 5175.6877733541

Scales and comparisons

• 138,644,998,720 seconds is equal to 4,408 years, 25 weeks, 11 hours, 38 minutes, 40 seconds.
• To count from 1 to 138,644,998,720 would take you about eight thousand, eight hundred sixteen 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 138644998720 cubic inches would be around 431.3 feet tall.

Recreational maths with 138644998720

• 138644998720 backwards is 027899446831
• The number of decimal digits it has is: 12
• The sum of 138644998720's digits is 61
• More coming soon!