1621390018

Names of 1621390018

• Cardinal: 1621390018 can be written as One billion, six hundred twenty-one million, three hundred ninety thousand and eighteen.

Scientific notation

• Scientific notation: 1.621390018 × 10⁹

Factors of 1621390018

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 19773092

Divisors of 1621390018

• Number of divisors d(n): 8
• Complete list of divisors:
  1 2 41 82 19773049 39546098 810695009 1621390018
• Sum of all divisors σ(n): 2491404300
• Sum of proper divisors (its aliquot sum) s(n): 870014282
• 1621390018 is a deficient number, because the sum of its proper divisors (870014282) is less than itself. Its deficiency is 751375736

Bases of 1621390018

• Binary: 1100000101001000111001011000010₂
• Hexadecimal: 0x60A472C2
• Base-36: QTC0JM

Squares and roots of 1621390018

• 1621390018 squared (1621390018²) is 2628905590470040324
• 1621390018 cubed (1621390018³) is 4262481282652519309391085832
• The square root of 1621390018 is 40266.4875299547
• The cube root of 1621390018 is 1174.7961059821

Scales and comparisons

• 1,621,390,018 seconds is equal to 51 years, 28 weeks, 6 days, 2 hours, 6 minutes, 58 seconds.
• To count from 1 to 1,621,390,018 would take you about one hundred three 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 1621390018 cubic inches would be around 97.9 feet tall.

Recreational maths with 1621390018

• 1621390018 backwards is 8100931261
• The number of decimal digits it has is: 10
• The sum of 1621390018's digits is 31
• More coming soon!