138923640

Names of 138923640

• Cardinal: 138923640 can be written as One hundred thirty-eight million, nine hundred twenty-three thousand, six hundred forty.

Scientific notation

• Scientific notation: 1.3892364 × 10⁸

Factors of 138923640

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 736

Divisors of 138923640

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 18 20 24 27 30 36 40 45 54 60 72 90 108 120 135 180 216 270 307 360 419 540 614 838 921 1080 1228 1257 1535 1676 1842 2095 2456 2514 2763 3070 3352 3684 3771 4190 4605 5028 5526 6140 6285 7368 7542 8289 8380 9210 10056 11052 11313 12280 12570 13815 15084 16578 16760 18420 18855 22104 22626 25140 27630 30168 33156 36840 37710 41445 45252 50280 55260 56565 66312 75420 82890 90504 110520 113130 128633 150840 165780 226260 257266 331560 385899 452520 514532 643165 771798 1029064 1157697 1286330 1543596 1929495 2315394 2572660 3087192 3473091 3858990 4630788 5145320 5788485 6946182 7717980 9261576 11576970 13892364 15435960 17365455 23153940 27784728 34730910 46307880 69461820 138923640
• Sum of all divisors σ(n): 465696000
• Sum of proper divisors (its aliquot sum) s(n): 326772360
• 138923640 is an abundant number, because the sum of its proper divisors (326772360) is greater than itself. Its abundance is 187848720

Bases of 138923640

• Binary: 1000010001111100111001111000₂
• Hexadecimal: 0x847CE78
• Base-36: 2APM60

Squares and roots of 138923640

• 138923640 squared (138923640²) is 19299777750849600
• 138923640 cubed (138923640³) is 2681195376339039524544000
• The square root of 138923640 is 11786.5872923421
• The cube root of 138923640 is 517.9152726367

Scales and comparisons

• 138,923,640 seconds is equal to 4 years, 21 weeks, 4 days, 21 hours, 54 minutes.
• To count from 1 to 138,923,640 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 138923640 cubic inches would be around 43.2 feet tall.

Recreational maths with 138923640

• 138923640 backwards is 046329831
• 138923640 is a Harshad number.
• The number of decimal digits it has is: 9
• The sum of 138923640's digits is 36
• More coming soon!