138868912

Names of 138868912

• Cardinal: 138868912 can be written as One hundred thirty-eight million, eight hundred sixty-eight thousand, nine hundred twelve.

Scientific notation

• Scientific notation: 1.38868912 × 10⁸

Factors of 138868912

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 900

Divisors of 138868912

• Number of divisors d(n): 80
• Complete list of divisors:
  1 2 4 7 8 13 14 16 26 28 52 56 91 104 112 127 182 208 254 364 508 728 751 889 1016 1456 1502 1651 1778 2032 3004 3302 3556 5257 6008 6604 7112 9763 10514 11557 12016 13208 14224 19526 21028 23114 26416 39052 42056 46228 68341 78104 84112 92456 95377 136682 156208 184912 190754 273364 381508 546728 667639 763016 1093456 1239901 1335278 1526032 2479802 2670556 4959604 5341112 8679307 9919208 10682224 17358614 19838416 34717228 69434456 138868912
• Sum of all divisors σ(n): 334200832
• Sum of proper divisors (its aliquot sum) s(n): 195331920
• 138868912 is an abundant number, because the sum of its proper divisors (195331920) is greater than itself. Its abundance is 56463008

Bases of 138868912

• Binary: 1000010001101111100010110000₂
• Hexadecimal: 0x846F8B0
• Base-36: 2AOFXS

Squares and roots of 138868912

• 138868912 squared (138868912²) is 19284574720063744
• 138868912 cubed (138868912³) is 2678027909757956699926528
• The square root of 138868912 is 11784.2654416811
• The cube root of 138868912 is 517.8472539997

Scales and comparisons

• 138,868,912 seconds is equal to 4 years, 21 weeks, 4 days, 6 hours, 41 minutes, 52 seconds.
• To count from 1 to 138,868,912 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 138868912 cubic inches would be around 43.2 feet tall.

Recreational maths with 138868912

• 138868912 backwards is 219868831
• The number of decimal digits it has is: 9
• The sum of 138868912's digits is 46
• More coming soon!