21628901

Names of 21628901

• Cardinal: 21628901 can be written as Twenty-one million, six hundred twenty-eight thousand, nine hundred one.

Scientific notation

• Scientific notation: 2.1628901 × 10⁷

Factors of 21628901

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 134371

Divisors of 21628901

• Number of divisors d(n): 8
• Complete list of divisors:
  1 7 23 161 134341 940387 3089843 21628901
• Sum of all divisors σ(n): 25793664
• Sum of proper divisors (its aliquot sum) s(n): 4164763
• 21628901 is a deficient number, because the sum of its proper divisors (4164763) is less than itself. Its deficiency is 17464138

Bases of 21628901

• Binary: 1010010100000011111100101₂
• Hexadecimal: 0x14A07E5
• Base-36: CVKYT

Squares and roots of 21628901

• 21628901 squared (21628901²) is 467809358467801
• 21628901 cubed (21628901³) is 10118202301173579516701
• The square root of 21628901 is 4650.6882286389
• The cube root of 21628901 is 278.6194844367

Scales and comparisons

• 21,628,901 seconds is equal to 35 weeks, 5 days, 8 hours, 1 minute, 41 seconds.
• To count from 1 to 21,628,901 would take you about four days!

  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 21628901 cubic inches would be around 23.2 feet tall.

Recreational maths with 21628901

• 21628901 backwards is 10982612
• The number of decimal digits it has is: 8
• The sum of 21628901's digits is 29
• More coming soon!