138690420

Names of 138690420

• Cardinal: 138690420 can be written as One hundred thirty-eight million, six hundred ninety thousand, four hundred twenty.

Scientific notation

• Scientific notation: 1.3869042 × 10⁸

Factors of 138690420

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 348

Divisors of 138690420

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 3 4 5 6 10 11 12 15 17 20 22 30 33 34 44 47 51 55 60 66 68 85 94 102 110 132 141 165 170 187 188 204 220 235 255 263 282 330 340 374 470 510 517 526 561 564 660 705 748 789 799 935 940 1020 1034 1052 1122 1315 1410 1551 1578 1598 1870 2068 2244 2397 2585 2630 2805 2820 2893 3102 3156 3196 3740 3945 3995 4471 4794 5170 5260 5610 5786 6204 7755 7890 7990 8679 8789 8942 9588 10340 11220 11572 11985 12361 13413 14465 15510 15780 15980 17358 17578 17884 22355 23970 24722 26367 26826 28930 31020 34716 35156 37083 43395 43945 44710 47940 49181 49444 52734 53652 57860 61805 67065 74166 86790 87890 89420 98362 105468 123610 131835 134130 135971 147543 148332 173580 175780 185415 196724 210137 245905 247220 263670 268260 271942 295086 370830 407913 420274 491810 527340 543884 590172 630411 679855 737715 741660 815826 840548 983620 1050685 1260822 1359710 1475430 1631652 2039565 2101370 2311507 2521644 2719420 2950860 3152055 4079130 4202740 4623014 6304110 6934521 8158260 9246028 11557535 12608220 13869042 23115070 27738084 34672605 46230140 69345210 138690420
• Sum of all divisors σ(n): 459841536
• Sum of proper divisors (its aliquot sum) s(n): 321151116
• 138690420 is an abundant number, because the sum of its proper divisors (321151116) is greater than itself. Its abundance is 182460696

Bases of 138690420

• Binary: 1000010001000011111101110100₂
• Hexadecimal: 0x8443F74
• Base-36: 2AKM7O

Squares and roots of 138690420

• 138690420 squared (138690420²) is 19235032599776400
• 138690420 cubed (138690420³) is 2667714749976680822088000
• The square root of 138690420 is 11776.6896876837
• The cube root of 138690420 is 517.6252911413

Scales and comparisons

• 138,690,420 seconds is equal to 4 years, 21 weeks, 2 days, 5 hours, 7 minutes.
• To count from 1 to 138,690,420 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 138690420 cubic inches would be around 43.1 feet tall.

Recreational maths with 138690420

• 138690420 backwards is 024096831
• 138690420 is a Harshad number.
• The number of decimal digits it has is: 9
• The sum of 138690420's digits is 33
• More coming soon!