138687361

Names of 138687361

• Cardinal: 138687361 can be written as One hundred thirty-eight million, six hundred eighty-seven thousand, three hundred sixty-one.

Scientific notation

• Scientific notation: 1.38687361 × 10⁸

Factors of 138687361

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 231362

Divisors of 138687361

• Number of divisors d(n): 4
• Complete list of divisors:
  1 601 230761 138687361
• Sum of all divisors σ(n): 138918724
• Sum of proper divisors (its aliquot sum) s(n): 231363
• 138687361 is a deficient number, because the sum of its proper divisors (231363) is less than itself. Its deficiency is 138455998

Bases of 138687361

• Binary: 1000010001000011001110000001₂
• Hexadecimal: 0x8443381
• Base-36: 2AKJUP

Squares and roots of 138687361

• 138687361 squared (138687361²) is 19234184101144321
• 138687361 cubed (138687361³) is 2667538233975862959626881
• The square root of 138687361 is 11776.5598117617
• The cube root of 138687361 is 517.6214854771

Scales and comparisons

• 138,687,361 seconds is equal to 4 years, 21 weeks, 2 days, 4 hours, 16 minutes, 1 second.
• To count from 1 to 138,687,361 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 138687361 cubic inches would be around 43.1 feet tall.

Recreational maths with 138687361

• 138687361 backwards is 163786831
• The number of decimal digits it has is: 9
• The sum of 138687361's digits is 43
• More coming soon!