2138936389

Names of 2138936389

• Cardinal: 2138936389 can be written as Two billion, one hundred thirty-eight million, nine hundred thirty-six thousand, three hundred eighty-nine.

Scientific notation

• Scientific notation: 2.138936389 × 10⁹

Factors of 2138936389

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 23427

Divisors of 2138936389

• Number of divisors d(n): 8
• Complete list of divisors:
  1 223 421 22783 93883 5080609 9591643 2138936389
• Sum of all divisors σ(n): 2153725952
• Sum of proper divisors (its aliquot sum) s(n): 14789563
• 2138936389 is a deficient number, because the sum of its proper divisors (14789563) is less than itself. Its deficiency is 2124146826

Bases of 2138936389

• Binary: 1111111011111011001010001000101₂
• Hexadecimal: 0x7F7D9445
• Base-36: ZDGTVP

Squares and roots of 2138936389

• 2138936389 squared (2138936389²) is 4575048876188359321
• 2138936389 cubed (2138936389³) is 9785738522732837369894231869
• The square root of 2138936389 is 46248.6366177427
• The cube root of 2138936389 is 1288.4452131417

Scales and comparisons

• 2,138,936,389 seconds is equal to 68 years, 4 days, 4 hours, 59 minutes, 49 seconds.
• To count from 1 to 2,138,936,389 would take you about one hundred thirty-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 2138936389 cubic inches would be around 107.4 feet tall.

Recreational maths with 2138936389

• 2138936389 backwards is 9836398312
• The number of decimal digits it has is: 10
• The sum of 2138936389's digits is 52
• More coming soon!