1218556842

Names of 1218556842

• Cardinal: 1218556842 can be written as One billion, two hundred eighteen million, five hundred fifty-six thousand, eight hundred forty-two.

Scientific notation

• Scientific notation: 1.218556842 × 10⁹

Factors of 1218556842

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 127837

Divisors of 1218556842

• Number of divisors d(n): 16
• Complete list of divisors:
  1 2 3 6 1609 3218 4827 9654 126223 252446 378669 757338 203092807 406185614 609278421 1218556842
• Sum of all divisors σ(n): 2438647680
• Sum of proper divisors (its aliquot sum) s(n): 1220090838
• 1218556842 is an abundant number, because the sum of its proper divisors (1220090838) is greater than itself. Its abundance is 1533996

Bases of 1218556842

• Binary: 1001000101000011011001110101010₂
• Hexadecimal: 0x48A1B3AA
• Base-36: K5HWH6

Squares and roots of 1218556842

• 1218556842 squared (1218556842²) is 1484880777185012964
• 1218556842 cubed (1218556842³) is 1809411630593075047140899688
• The square root of 1218556842 is 34907.8335334635
• The cube root of 1218556842 is 1068.1082367965

Scales and comparisons

• 1,218,556,842 seconds is equal to 38 years, 38 weeks, 5 days, 16 hours, 42 seconds.
• To count from 1 to 1,218,556,842 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 1218556842 cubic inches would be around 89 feet tall.

Recreational maths with 1218556842

• 1218556842 backwards is 2486558121
• The number of decimal digits it has is: 10
• The sum of 1218556842's digits is 42
• More coming soon!