129347820

Names of 129347820

• Cardinal: 129347820 can be written as One hundred twenty-nine million, three hundred forty-seven thousand, eight hundred twenty.

Scientific notation

• Scientific notation: 1.2934782 × 10⁸

Factors of 129347820

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 1837

Divisors of 129347820

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 3 4 5 6 7 9 10 12 14 15 18 19 20 21 27 28 30 35 36 38 42 45 54 57 60 63 70 76 84 90 95 105 108 114 126 133 135 140 171 180 189 190 210 228 252 266 270 285 315 342 378 380 399 420 513 532 540 570 630 665 684 756 798 855 945 1026 1140 1197 1260 1330 1596 1710 1801 1890 1995 2052 2394 2565 2660 3420 3591 3602 3780 3990 4788 5130 5403 5985 7182 7204 7980 9005 10260 10806 11970 12607 14364 16209 17955 18010 21612 23940 25214 27015 32418 34219 35910 36020 37821 48627 50428 54030 63035 64836 68438 71820 75642 81045 97254 102657 108060 113463 126070 136876 151284 162090 171095 189105 194508 205314 226926 239533 243135 252140 307971 324180 340389 342190 378210 410628 453852 479066 486270 513285 567315 615942 680778 684380 718599 756420 923913 958132 972540 1026570 1134630 1197665 1231884 1361556 1437198 1539855 1701945 1847826 2053140 2155797 2269260 2395330 2874396 3079710 3403890 3592995 3695652 4311594 4619565 4790660 6159420 6467391 6807780 7185990 8623188 9239130 10778985 12934782 14371980 18478260 21557970 25869564 32336955 43115940 64673910 129347820
• Sum of all divisors σ(n): 484377600
• Sum of proper divisors (its aliquot sum) s(n): 355029780
• 129347820 is an abundant number, because the sum of its proper divisors (355029780) is greater than itself. Its abundance is 225681960

Bases of 129347820

• Binary: 111101101011011000011101100₂
• Hexadecimal: 0x7B5B0EC
• Base-36: 250DF0

Squares and roots of 129347820

• 129347820 squared (129347820²) is 16730858538752400
• 129347820 cubed (129347820³) is 2164100078716008459768000
• The square root of 129347820 is 11373.1183059001
• The cube root of 129347820 is 505.7311501743

Scales and comparisons

• 129,347,820 seconds is equal to 4 years, 5 weeks, 6 days, 1 hour, 57 minutes.
• To count from 1 to 129,347,820 would take you about 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 129347820 cubic inches would be around 42.1 feet tall.

Recreational maths with 129347820

• 129347820 backwards is 028743921
• 129347820 is a Harshad number.
• The number of decimal digits it has is: 9
• The sum of 129347820's digits is 36
• More coming soon!