1987990550

Names of 1987990550

• Cardinal: 1987990550 can be written as One billion, nine hundred eighty-seven million, nine hundred ninety thousand, five hundred fifty.

Scientific notation

• Scientific notation: 1.98799055 × 10⁹

Factors of 1987990550

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 688

Divisors of 1987990550

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 5 7 10 13 14 25 26 35 50 65 70 91 130 175 182 325 350 455 650 661 910 1322 2275 3305 4550 4627 6610 8593 9254 16525 17186 23135 33050 42965 46270 60151 85930 115675 120302 214825 231350 300755 429650 436921 601510 873842 1503775 2184605 3007550 3058447 4369210 5679973 6116894 10923025 11359946 15292235 21846050 28399865 30584470 39759811 56799730 76461175 79519622 141999325 152922350 198799055 283998650 397598110 993995275 1987990550
• Sum of all divisors σ(n): 4557864528
• Sum of proper divisors (its aliquot sum) s(n): 2569873978
• 1987990550 is an abundant number, because the sum of its proper divisors (2569873978) is greater than itself. Its abundance is 581883428

Bases of 1987990550

• Binary: 1110110011111100101010000010110₂
• Hexadecimal: 0x767E5416
• Base-36: WVLJBQ

Squares and roots of 1987990550

• 1987990550 squared (1987990550²) is 3952106426889302500
• 1987990550 cubed (1987990550³) is 7856750229250199266091375000
• The square root of 1987990550 is 44586.8876464819
• The cube root of 1987990550 is 1257.3941588881

Scales and comparisons

• 1,987,990,550 seconds is equal to 63 years, 11 weeks, 3 hours, 35 minutes, 50 seconds.
• To count from 1 to 1,987,990,550 would take you about one hundred twenty-six 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 1987990550 cubic inches would be around 104.8 feet tall.

Recreational maths with 1987990550

• 1987990550 backwards is 0550997891
• The number of decimal digits it has is: 10
• The sum of 1987990550's digits is 53
• More coming soon!