138745320

Names of 138745320

• Cardinal: 138745320 can be written as One hundred thirty-eight million, seven hundred forty-five thousand, three hundred twenty.

Scientific notation

• Scientific notation: 1.3874532 × 10⁸

Factors of 138745320

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 165190

Divisors of 138745320

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 3 4 5 6 7 8 10 12 14 15 20 21 24 28 30 35 40 42 56 60 70 84 105 120 140 168 210 280 420 840 165173 330346 495519 660692 825865 991038 1156211 1321384 1651730 1982076 2312422 2477595 3303460 3468633 3964152 4624844 4955190 5781055 6606920 6937266 9249688 9910380 11562110 13874532 17343165 19820760 23124220 27749064 34686330 46248440 69372660 138745320
• Sum of all divisors σ(n): 475701120
• Sum of proper divisors (its aliquot sum) s(n): 336955800
• 138745320 is an abundant number, because the sum of its proper divisors (336955800) is greater than itself. Its abundance is 198210480

Bases of 138745320

• Binary: 1000010001010001010111101000₂
• Hexadecimal: 0x84515E8
• Base-36: 2ALSKO

Squares and roots of 138745320

• 138745320 squared (138745320²) is 19250263821902400
• 138745320 cubed (138745320³) is 2670884014054271496768000
• The square root of 138745320 is 11779.0203327783
• The cube root of 138745320 is 517.6935820385

Scales and comparisons

• 138,745,320 seconds is equal to 4 years, 21 weeks, 2 days, 20 hours, 22 minutes.
• To count from 1 to 138,745,320 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 138745320 cubic inches would be around 43.1 feet tall.

Recreational maths with 138745320

• 138745320 backwards is 023547831
• The number of decimal digits it has is: 9
• The sum of 138745320's digits is 33
• More coming soon!