28397821

Names of 28397821

• Cardinal: 28397821 can be written as Twenty-eight million, three hundred ninety-seven thousand, eight hundred twenty-one.

Scientific notation

• Scientific notation: 2.8397821 × 10⁷

Factors of 28397821

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 4835

Divisors of 28397821

• Number of divisors d(n): 8
• Complete list of divisors:
  1 59 103 4673 6077 275707 481319 28397821
• Sum of all divisors σ(n): 29165760
• Sum of proper divisors (its aliquot sum) s(n): 767939
• 28397821 is a deficient number, because the sum of its proper divisors (767939) is less than itself. Its deficiency is 27629882

Bases of 28397821

• Binary: 1101100010101000011111101₂
• Hexadecimal: 0x1B150FD
• Base-36: GWNWD

Squares and roots of 28397821

• 28397821 squared (28397821²) is 806436237548041
• 28397821 cubed (28397821³) is 22901031921802747218661
• The square root of 28397821 is 5328.9605928357
• The cube root of 28397821 is 305.0902572617

Scales and comparisons

• 28,397,821 seconds is equal to 46 weeks, 6 days, 16 hours, 17 minutes, 1 second.
• To count from 1 to 28,397,821 would take you about eighteen 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 28397821 cubic inches would be around 25.4 feet tall.

Recreational maths with 28397821

• 28397821 backwards is 12879382
• The number of decimal digits it has is: 8
• The sum of 28397821's digits is 40
• More coming soon!