813902985

Names of 813902985

• Cardinal: 813902985 can be written as Eight hundred thirteen million, nine hundred two thousand, nine hundred eighty-five.

Scientific notation

• Scientific notation: 8.13902985 × 10⁸

Factors of 813902985

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 46

Divisors of 813902985

• Number of divisors d(n): 160
• Complete list of divisors:
  1 3 5 7 9 15 21 27 31 35 45 49 63 81 93 105 135 147 155 189 217 243 245 279 315 343 405 441 465 567 651 729 735 837 945 1029 1085 1215 1323 1395 1519 1701 1715 1953 2187 2205 2401 2511 2835 3087 3255 3645 3969 4185 4557 5103 5145 5859 6615 7203 7533 7595 8505 9261 9765 10633 10935 11907 12005 12555 13671 15309 15435 17577 19845 21609 22599 22785 25515 27783 29295 31899 35721 36015 37665 41013 46305 52731 53165 59535 64827 67797 68355 74431 76545 83349 87885 95697 107163 108045 112995 123039 138915 158193 159495 178605 194481 205065 223293 250047 263655 287091 324135 338985 369117 372155 416745 474579 478485 535815 583443 615195 669879 750141 790965 861273 972405 1107351 1116465 1250235 1435455 1750329 1845585 2009637 2372895 2583819 2917215 3322053 3349395 3750705 4306365 5250987 5536755 6028911 7751457 8751645 10048185 12919095 16610265 18086733 23254371 26254935 30144555 38757285 54260199 90433665 116271855 162780597 271300995 813902985
• Sum of all divisors σ(n): 1763957760
• Sum of proper divisors (its aliquot sum) s(n): 950054775
• 813902985 is an abundant number, because the sum of its proper divisors (950054775) is greater than itself. Its abundance is 136151790

Bases of 813902985

• Binary: 110000100000110010110010001001₂
• Hexadecimal: 0x30832C89
• Base-36: DGKRK9

Squares and roots of 813902985

• 813902985 squared (813902985²) is 662438068991910225
• 813902985 cubed (813902985³) is 539160321730151672979521625
• The square root of 813902985 is 28528.9849977175
• The cube root of 813902985 is 933.6645734009

Scales and comparisons

• 813,902,985 seconds is equal to 25 years, 45 weeks, 5 days, 4 hours, 9 minutes, 45 seconds.
• To count from 1 to 813,902,985 would take you about thirty-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 813902985 cubic inches would be around 77.8 feet tall.

Recreational maths with 813902985

• 813902985 backwards is 589209318
• 813902985 is a Harshad number.
• The number of decimal digits it has is: 9
• The sum of 813902985's digits is 45
• More coming soon!