28005000

Names of 28005000

• Cardinal: 28005000 can be written as Twenty-eight million, five thousand.

Scientific notation

• Scientific notation: 2.8005 × 10⁷

Factors of 28005000

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 1877

Divisors of 28005000

• Number of divisors d(n): 80
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 15 20 24 25 30 40 50 60 75 100 120 125 150 200 250 300 375 500 600 625 750 1000 1250 1500 1867 1875 2500 3000 3734 3750 5000 5601 7468 7500 9335 11202 14936 15000 18670 22404 28005 37340 44808 46675 56010 74680 93350 112020 140025 186700 224040 233375 280050 373400 466750 560100 700125 933500 1120200 1166875 1400250 1867000 2333750 2800500 3500625 4667500 5601000 7001250 9335000 14002500 28005000
• Sum of all divisors σ(n): 87534480
• Sum of proper divisors (its aliquot sum) s(n): 59529480
• 28005000 is an abundant number, because the sum of its proper divisors (59529480) is greater than itself. Its abundance is 31524480

Bases of 28005000

• Binary: 1101010110101001010001000₂
• Hexadecimal: 0x1AB5288
• Base-36: GO8SO

Squares and roots of 28005000

• 28005000 squared (28005000²) is 784280025000000
• 28005000 cubed (28005000³) is 21963762100125000000000
• The square root of 28005000 is 5291.9750566305
• The cube root of 28005000 is 303.6769710461

Scales and comparisons

• 28,005,000 seconds is equal to 46 weeks, 2 days, 3 hours, 10 minutes.
• To count from 1 to 28,005,000 would take you about seventeen weeks!

  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 28005000 cubic inches would be around 25.3 feet tall.

Recreational maths with 28005000

• 28005000 backwards is 00050082
• 28005000 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 28005000's digits is 15
• More coming soon!