28385

Names of 28385

• Cardinal: 28385 can be written as Twenty-eight thousand, three hundred eighty-five.

Scientific notation

• Scientific notation: 2.8385 × 10⁴

Factors of 28385

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 823

Divisors of 28385

• Number of divisors d(n): 8
• Complete list of divisors:
  1 5 7 35 811 4055 5677 28385
• Sum of all divisors σ(n): 38976
• Sum of proper divisors (its aliquot sum) s(n): 10591
• 28385 is a deficient number, because the sum of its proper divisors (10591) is less than itself. Its deficiency is 17794

Bases of 28385

• Binary: 110111011100001₂
• Hexadecimal: 0x6EE1
• Base-36: LWH

Squares and roots of 28385

• 28385 squared (28385²) is 805708225
• 28385 cubed (28385³) is 22870027966625
• The square root of 28385 is 168.4784852735
• The cube root of 28385 is 30.5044336473

Scales and comparisons

• 28,385 seconds is equal to 7 hours, 53 minutes, 5 seconds.
• To count from 1 to 28,385 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 28385 cubic inches would be around 2.5 feet tall.

Recreational maths with 28385

• 28385 backwards is 58382
• The number of decimal digits it has is: 5
• The sum of 28385's digits is 26
• More coming soon!