1220801981

Names of 1220801981

• Cardinal: 1220801981 can be written as One billion, two hundred twenty million, eight hundred one thousand, nine hundred eighty-one.

Scientific notation

• Scientific notation: 1.220801981 × 10⁹

Factors of 1220801981

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 128608

Divisors of 1220801981

• Number of divisors d(n): 16
• Complete list of divisors:
  1 7 23 59 161 413 1357 9499 128519 899633 2955937 7582621 20691559 53078347 174400283 1220801981
• Sum of all divisors σ(n): 1480550400
• Sum of proper divisors (its aliquot sum) s(n): 259748419
• 1220801981 is a deficient number, because the sum of its proper divisors (259748419) is less than itself. Its deficiency is 961053562

Bases of 1220801981

• Binary: 1001000110000111111010110111101₂
• Hexadecimal: 0x48C3F5BD
• Base-36: K6U0U5

Squares and roots of 1220801981

• 1220801981 squared (1220801981²) is 1490357476813524361
• 1220801981 cubed (1220801981³) is 1819431360092112107500559141
• The square root of 1220801981 is 34939.9768317039
• The cube root of 1220801981 is 1068.7638156235

Scales and comparisons

• 1,220,801,981 seconds is equal to 38 years, 42 weeks, 3 days, 15 hours, 39 minutes, 41 seconds.
• To count from 1 to 1,220,801,981 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 1220801981 cubic inches would be around 89.1 feet tall.

Recreational maths with 1220801981

• 1220801981 backwards is 1891080221
• The number of decimal digits it has is: 10
• The sum of 1220801981's digits is 32
• More coming soon!