28109

Names of 28109

• Cardinal: 28109 can be written as Twenty-eight thousand, one hundred nine.

Scientific notation

• Scientific notation: 2.8109 × 10⁴

Factors of 28109

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 28109

Divisors of 28109

• Number of divisors d(n): 2
• Complete list of divisors:
  1 28109
• Sum of all divisors σ(n): 28110
• Sum of proper divisors (its aliquot sum) s(n): 1
• 28109 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 28108

Bases of 28109

• Binary: 110110111001101₂
• Hexadecimal: 0x6DCD
• Base-36: LOT

Squares and roots of 28109

• 28109 squared (28109²) is 790115881
• 28109 cubed (28109³) is 22209367299029
• The square root of 28109 is 167.6573887427
• The cube root of 28109 is 30.4052420557

Scales and comparisons

• 28,109 seconds is equal to 7 hours, 48 minutes, 29 seconds.
• To count from 1 to 28,109 would take you about seven 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 28109 cubic inches would be around 2.5 feet tall.

Recreational maths with 28109

• 28109 backwards is 90182
• 28109 is a twin prime! Its twin is 28111
• The number of decimal digits it has is: 5
• The sum of 28109's digits is 20
• More coming soon!