1388618990

Names of 1388618990

• Cardinal: 1388618990 can be written as One billion, three hundred eighty-eight million, six hundred eighteen thousand, nine hundred ninety.

Scientific notation

• Scientific notation: 1.38861899 × 10⁹

Factors of 1388618990

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 54

Divisors of 1388618990

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 5 10 11 17 19 22 34 38 55 85 95 110 121 170 187 190 209 242 289 323 361 374 418 578 605 646 722 935 1045 1210 1331 1445 1615 1805 1870 2057 2090 2299 2662 2890 3179 3230 3553 3610 3971 4114 4598 5491 6137 6358 6655 7106 7942 10285 10982 11495 12274 13310 15895 17765 19855 20570 22627 22990 25289 27455 30685 31790 34969 35530 39083 39710 43681 45254 50578 54910 60401 61370 67507 69938 78166 87362 104329 113135 120802 126445 135014 174845 195415 208658 218405 226270 252890 302005 337535 349690 384659 390830 429913 436810 480491 521645 604010 664411 675070 742577 769318 859826 960982 1043290 1147619 1328822 1485154 1923295 2149565 2295238 2402455 3322055 3712885 3846590 4299130 4804910 5738095 6644110 7308521 7425770 8168347 11476190 12623809 14617042 16336694 25247618 36542605 40841735 63119045 73085210 81683470 126238090 138861899 277723798 694309495 1388618990
• Sum of all divisors σ(n): 3082314384
• Sum of proper divisors (its aliquot sum) s(n): 1693695394
• 1388618990 is an abundant number, because the sum of its proper divisors (1693695394) is greater than itself. Its abundance is 305076404

Bases of 1388618990

• Binary: 1010010110001001010010011101110₂
• Hexadecimal: 0x52C4A4EE
• Base-36: MYQX9Q

Squares and roots of 1388618990

• 1388618990 squared (1388618990²) is 1928262699388620100
• 1388618990 cubed (1388618990³) is 2677622202079699260755699000
• The square root of 1388618990 is 37264.1783754855
• The cube root of 1388618990 is 1115.6493071045

Scales and comparisons

• 1,388,618,990 seconds is equal to 44 years, 7 weeks, 6 days, 23 hours, 29 minutes, 50 seconds.
• To count from 1 to 1,388,618,990 would take you about eighty-eight 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 1388618990 cubic inches would be around 93 feet tall.

Recreational maths with 1388618990

• 1388618990 backwards is 0998168831
• The number of decimal digits it has is: 10
• The sum of 1388618990's digits is 53
• More coming soon!