128138

Names of 128138

• Cardinal: 128138 can be written as One hundred twenty-eight thousand, one hundred thirty-eight.

Scientific notation

• Scientific notation: 1.28138 × 10⁵

Factors of 128138

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 892

Divisors of 128138

• Number of divisors d(n): 8
• Complete list of divisors:
  1 2 79 158 811 1622 64069 128138
• Sum of all divisors σ(n): 194880
• Sum of proper divisors (its aliquot sum) s(n): 66742
• 128138 is a deficient number, because the sum of its proper divisors (66742) is less than itself. Its deficiency is 61396

Bases of 128138

• Binary: 11111010010001010₂
• Hexadecimal: 0x1F48A
• Base-36: 2QVE

Squares and roots of 128138

• 128138 squared (128138²) is 16419347044
• 128138 cubed (128138³) is 2103942291524072
• The square root of 128138 is 357.9636853089
• The cube root of 128138 is 50.4149468561

Scales and comparisons

• 128,138 seconds is equal to 1 day, 11 hours, 35 minutes, 38 seconds.
• To count from 1 to 128,138 would take you about eleven 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 128138 cubic inches would be around 4.2 feet tall.

Recreational maths with 128138

• 128138 backwards is 831821
• The number of decimal digits it has is: 6
• The sum of 128138's digits is 23
• More coming soon!