21028000

Names of 21028000

• Cardinal: 21028000 can be written as Twenty-one million, twenty-eight thousand.

Scientific notation

• Scientific notation: 2.1028 × 10⁷

Factors of 21028000

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 765

Divisors of 21028000

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 4 5 7 8 10 14 16 20 25 28 32 35 40 50 56 70 80 100 112 125 140 160 175 200 224 250 280 350 400 500 560 700 751 800 875 1000 1120 1400 1502 1750 2000 2800 3004 3500 3755 4000 5257 5600 6008 7000 7510 10514 12016 14000 15020 18775 21028 24032 26285 28000 30040 37550 42056 52570 60080 75100 84112 93875 105140 120160 131425 150200 168224 187750 210280 262850 300400 375500 420560 525700 600800 657125 751000 841120 1051400 1314250 1502000 2102800 2628500 3004000 4205600 5257000 10514000 21028000
• Sum of all divisors σ(n): 59125248
• Sum of proper divisors (its aliquot sum) s(n): 38097248
• 21028000 is an abundant number, because the sum of its proper divisors (38097248) is greater than itself. Its abundance is 17069248

Bases of 21028000

• Binary: 1010000001101110010100000₂
• Hexadecimal: 0x140DCA0
• Base-36: CIPB4

Squares and roots of 21028000

• 21028000 squared (21028000²) is 442176784000000
• 21028000 cubed (21028000³) is 9298093413952000000000
• The square root of 21028000 is 4585.6297277473
• The cube root of 21028000 is 276.0149820335

Scales and comparisons

• 21,028,000 seconds is equal to 34 weeks, 5 days, 9 hours, 6 minutes, 40 seconds.
• To count from 1 to 21,028,000 would take you about forty minutes!

  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 21028000 cubic inches would be around 23 feet tall.

Recreational maths with 21028000

• 21028000 backwards is 00082012
• The number of decimal digits it has is: 8
• The sum of 21028000's digits is 13
• More coming soon!