138405384

Names of 138405384

• Cardinal: 138405384 can be written as One hundred thirty-eight million, four hundred five thousand, three hundred eighty-four.

Scientific notation

• Scientific notation: 1.38405384 × 10⁸

Factors of 138405384

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 2292

Divisors of 138405384

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 4 6 8 9 12 13 18 24 26 36 39 52 67 72 78 104 117 134 156 201 234 268 312 402 468 536 603 804 871 936 1206 1608 1742 2207 2412 2613 3484 4414 4824 5226 6621 6968 7839 8828 10452 13242 15678 17656 19863 20904 26484 28691 31356 39726 52968 57382 62712 79452 86073 114764 147869 158904 172146 229528 258219 295738 344292 443607 516438 591476 688584 887214 1032876 1182952 1330821 1774428 1922297 2065752 2661642 3548856 3844594 5323284 5766891 7689188 10646568 11533782 15378376 17300673 23067564 34601346 46135128 69202692 138405384
• Sum of all divisors σ(n): 409893120
• Sum of proper divisors (its aliquot sum) s(n): 271487736
• 138405384 is an abundant number, because the sum of its proper divisors (271487736) is greater than itself. Its abundance is 133082352

Bases of 138405384

• Binary: 1000001111111110011000001000₂
• Hexadecimal: 0x83FE608
• Base-36: 2AEIA0

Squares and roots of 138405384

• 138405384 squared (138405384²) is 19156050320187456
• 138405384 cubed (138405384³) is 2651300500488867799663104
• The square root of 138405384 is 11764.5817605217
• The cube root of 138405384 is 517.2704407873

Scales and comparisons

• 138,405,384 seconds is equal to 4 years, 20 weeks, 5 days, 21 hours, 56 minutes, 24 seconds.
• To count from 1 to 138,405,384 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 138405384 cubic inches would be around 43.1 feet tall.

Recreational maths with 138405384

• 138405384 backwards is 483504831
• 138405384 is a Harshad number.
• The number of decimal digits it has is: 9
• The sum of 138405384's digits is 36
• More coming soon!