28865

Names of 28865

• Cardinal: 28865 can be written as Twenty-eight thousand, eight hundred sixty-five.

Scientific notation

• Scientific notation: 2.8865 × 10⁴

Factors of 28865

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 279

Divisors of 28865

• Number of divisors d(n): 8
• Complete list of divisors:
  1 5 23 115 251 1255 5773 28865
• Sum of all divisors σ(n): 36288
• Sum of proper divisors (its aliquot sum) s(n): 7423
• 28865 is a deficient number, because the sum of its proper divisors (7423) is less than itself. Its deficiency is 21442

Bases of 28865

• Binary: 111000011000001₂
• Hexadecimal: 0x70C1
• Base-36: M9T

Squares and roots of 28865

• 28865 squared (28865²) is 833188225
• 28865 cubed (28865³) is 24049978114625
• The square root of 28865 is 169.8970276373
• The cube root of 28865 is 30.6754202065

Scales and comparisons

• 28,865 seconds is equal to 8 hours, 1 minute, 5 seconds.
• To count from 1 to 28,865 would take you about eight 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 28865 cubic inches would be around 2.6 feet tall.

Recreational maths with 28865

• 28865 backwards is 56882
• The number of decimal digits it has is: 5
• The sum of 28865's digits is 29
• More coming soon!