813904380

Names of 813904380

• Cardinal: 813904380 can be written as Eight hundred thirteen million, nine hundred four thousand, three hundred eighty.

Scientific notation

• Scientific notation: 8.1390438 × 10⁸

Factors of 813904380

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 145902

Divisors of 813904380

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 3 4 5 6 9 10 12 15 18 20 30 31 36 45 60 62 90 93 124 155 180 186 279 310 372 465 558 620 930 1116 1395 1860 2790 5580 145861 291722 437583 583444 729305 875166 1312749 1458610 1750332 2187915 2625498 2917220 4375830 4521691 5250996 6563745 8751660 9043382 13127490 13565073 18086764 22608455 26254980 27130146 40695219 45216910 54260292 67825365 81390438 90433820 135650730 162780876 203476095 271301460 406952190 813904380
• Sum of all divisors σ(n): 2548500864
• Sum of proper divisors (its aliquot sum) s(n): 1734596484
• 813904380 is an abundant number, because the sum of its proper divisors (1734596484) is greater than itself. Its abundance is 920692104

Bases of 813904380

• Binary: 110000100000110011000111111100₂
• Hexadecimal: 0x308331FC
• Base-36: DGKSN0

Squares and roots of 813904380

• 813904380 squared (813904380²) is 662440339783184400
• 813904380 cubed (813904380³) is 539163094038222033507672000
• The square root of 813904380 is 28529.0094465265
• The cube root of 813904380 is 933.6651068233

Scales and comparisons

• 813,904,380 seconds is equal to 25 years, 45 weeks, 5 days, 4 hours, 33 minutes.
• To count from 1 to 813,904,380 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 813904380 cubic inches would be around 77.8 feet tall.

Recreational maths with 813904380

• 813904380 backwards is 083409318
• 813904380 is a Harshad number.
• The number of decimal digits it has is: 9
• The sum of 813904380's digits is 36
• More coming soon!