28639

Names of 28639

• Cardinal: 28639 can be written as Twenty-eight thousand, six hundred thirty-nine.

Scientific notation

• Scientific notation: 2.8639 × 10⁴

Factors of 28639

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 2216

Divisors of 28639

• Number of divisors d(n): 4
• Complete list of divisors:
  1 13 2203 28639
• Sum of all divisors σ(n): 30856
• Sum of proper divisors (its aliquot sum) s(n): 2217
• 28639 is a deficient number, because the sum of its proper divisors (2217) is less than itself. Its deficiency is 26422

Bases of 28639

• Binary: 110111111011111₂
• Hexadecimal: 0x6FDF
• Base-36: M3J

Squares and roots of 28639

• 28639 squared (28639²) is 820192321
• 28639 cubed (28639³) is 23489487881119
• The square root of 28639 is 169.2306118881
• The cube root of 28639 is 30.5951520935

Scales and comparisons

• 28,639 seconds is equal to 7 hours, 57 minutes, 19 seconds.
• To count from 1 to 28,639 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 28639 cubic inches would be around 2.5 feet tall.

Recreational maths with 28639

• 28639 backwards is 93682
• The number of decimal digits it has is: 5
• The sum of 28639's digits is 28
• More coming soon!