1138949021

Names of 1138949021

• Cardinal: 1138949021 can be written as One billion, one hundred thirty-eight million, nine hundred forty-nine thousand and twenty-one.

Scientific notation

• Scientific notation: 1.138949021 × 10⁹

Factors of 1138949021

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 11744

Divisors of 1138949021

• Number of divisors d(n): 16
• Complete list of divisors:
  1 7 31 217 467 3269 11239 14477 78673 101339 348409 2438863 5248613 36740291 162707003 1138949021
• Sum of all divisors σ(n): 1346641920
• Sum of proper divisors (its aliquot sum) s(n): 207692899
• 1138949021 is a deficient number, because the sum of its proper divisors (207692899) is less than itself. Its deficiency is 931256122

Bases of 1138949021

• Binary: 1000011111000101111101110011101₂
• Hexadecimal: 0x43E2FB9D
• Base-36: IU3MOT

Squares and roots of 1138949021

• 1138949021 squared (1138949021²) is 1297204872436858441
• 1138949021 cubed (1138949021³) is 1477450219498389805692536261
• The square root of 1138949021 is 33748.3187877561
• The cube root of 1138949021 is 1044.3228050705

Scales and comparisons

• 1,138,949,021 seconds is equal to 36 years, 11 weeks, 1 day, 6 hours, 43 minutes, 41 seconds.
• To count from 1 to 1,138,949,021 would take you about seventy-two 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 1138949021 cubic inches would be around 87 feet tall.

Recreational maths with 1138949021

• 1138949021 backwards is 1209498311
• The number of decimal digits it has is: 10
• The sum of 1138949021's digits is 38
• More coming soon!