1221828385

Names of 1221828385

• Cardinal: 1221828385 can be written as One billion, two hundred twenty-one million, eight hundred twenty-eight thousand, three hundred eighty-five.

Scientific notation

• Scientific notation: 1.221828385 × 10⁹

Factors of 1221828385

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 244365682

Divisors of 1221828385

• Number of divisors d(n): 4
• Complete list of divisors:
  1 5 244365677 1221828385
• Sum of all divisors σ(n): 1466194068
• Sum of proper divisors (its aliquot sum) s(n): 244365683
• 1221828385 is a deficient number, because the sum of its proper divisors (244365683) is less than itself. Its deficiency is 977462702

Bases of 1221828385

• Binary: 1001000110100111001111100100001₂
• Hexadecimal: 0x48D39F21
• Base-36: K7G0TD

Squares and roots of 1221828385

• 1221828385 squared (1221828385²) is 1492864602391708225
• 1221828385 cubed (1221828385³) is 1824024346163927997942966625
• The square root of 1221828385 is 34954.6618493155
• The cube root of 1221828385 is 1069.0632570785

Scales and comparisons

• 1,221,828,385 seconds is equal to 38 years, 44 weeks, 1 day, 12 hours, 46 minutes, 25 seconds.
• To count from 1 to 1,221,828,385 would take you about seventy-seven years!

  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 1221828385 cubic inches would be around 89.1 feet tall.

Recreational maths with 1221828385

• 1221828385 backwards is 5838281221
• The number of decimal digits it has is: 10
• The sum of 1221828385's digits is 40
• More coming soon!