1997816440

Names of 1997816440

• Cardinal: 1997816440 can be written as One billion, nine hundred ninety-seven million, eight hundred sixteen thousand, four hundred forty.

Scientific notation

• Scientific notation: 1.99781644 × 10⁹

Factors of 1997816440

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 49945418

Divisors of 1997816440

• Number of divisors d(n): 16
• Complete list of divisors:
  1 2 4 5 8 10 20 40 49945411 99890822 199781644 249727055 399563288 499454110 998908220 1997816440
• Sum of all divisors σ(n): 4495087080
• Sum of proper divisors (its aliquot sum) s(n): 2497270640
• 1997816440 is an abundant number, because the sum of its proper divisors (2497270640) is greater than itself. Its abundance is 499454200

Bases of 1997816440

• Binary: 1110111000101000100001001111000₂
• Hexadecimal: 0x77144278
• Base-36: X1G514

Squares and roots of 1997816440

• 1997816440 squared (1997816440²) is 3991270527934273600
• 1997816440 cubed (1997816440³) is 7973825877194571037537984000
• The square root of 1997816440 is 44696.9399400003
• The cube root of 1997816440 is 1259.4623640583

Scales and comparisons

• 1,997,816,440 seconds is equal to 63 years, 27 weeks, 1 day, 21 hours, 40 seconds.
• To count from 1 to 1,997,816,440 would take you about one hundred twenty-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 1997816440 cubic inches would be around 105 feet tall.

Recreational maths with 1997816440

• 1997816440 backwards is 0446187991
• The number of decimal digits it has is: 10
• The sum of 1997816440's digits is 49
• More coming soon!