138443842

Names of 138443842

• Cardinal: 138443842 can be written as One hundred thirty-eight million, four hundred forty-three thousand, eight hundred forty-two.

Scientific notation

• Scientific notation: 1.38443842 × 10⁸

Factors of 138443842

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 54465

Divisors of 138443842

• Number of divisors d(n): 16
• Complete list of divisors:
  1 2 19 38 67 134 1273 2546 54377 108754 1033163 2066326 3643259 7286518 69221921 138443842
• Sum of all divisors σ(n): 221862240
• Sum of proper divisors (its aliquot sum) s(n): 83418398
• 138443842 is a deficient number, because the sum of its proper divisors (83418398) is less than itself. Its deficiency is 55025444

Bases of 138443842

• Binary: 1000010000000111110001000010₂
• Hexadecimal: 0x8407C42
• Base-36: 2AFBYA

Squares and roots of 138443842

• 138443842 squared (138443842²) is 19166697387720964
• 138443842 cubed (138443842³) is 2653511224807453880103688
• The square root of 138443842 is 11766.2161292405
• The cube root of 138443842 is 517.3183467859

Scales and comparisons

• 138,443,842 seconds is equal to 4 years, 20 weeks, 6 days, 8 hours, 37 minutes, 22 seconds.
• To count from 1 to 138,443,842 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 138443842 cubic inches would be around 43.1 feet tall.

Recreational maths with 138443842

• 138443842 backwards is 248344831
• The number of decimal digits it has is: 9
• The sum of 138443842's digits is 37
• More coming soon!