138821

Names of 138821

• Cardinal: 138821 can be written as One hundred thirty-eight thousand, eight hundred twenty-one.

Scientific notation

• Scientific notation: 1.38821 × 10⁵

Factors of 138821

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 138821

Divisors of 138821

• Number of divisors d(n): 2
• Complete list of divisors:
  1 138821
• Sum of all divisors σ(n): 138822
• Sum of proper divisors (its aliquot sum) s(n): 1
• 138821 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 138820

Bases of 138821

• Binary: 100001111001000101₂
• Hexadecimal: 0x21E45
• Base-36: 2Z45

Squares and roots of 138821

• 138821 squared (138821²) is 19271270041
• 138821 cubed (138821³) is 2675256978361661
• The square root of 138821 is 372.5869026147
• The cube root of 138821 is 51.7787691945

Scales and comparisons

• 138,821 seconds is equal to 1 day, 14 hours, 33 minutes, 41 seconds.
• To count from 1 to 138,821 would take you about fourteen hours.

  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 138821 cubic inches would be around 4.3 feet tall.

Recreational maths with 138821

• 138821 backwards is 128831
• The number of decimal digits it has is: 6
• The sum of 138821's digits is 23
• More coming soon!