129988040

Names of 129988040

• Cardinal: 129988040 can be written as One hundred twenty-nine million, nine hundred eighty-eight thousand and forty.

Scientific notation

• Scientific notation: 1.2998804 × 10⁸

Factors of 129988040

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 135

Divisors of 129988040

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 4 5 7 8 10 13 14 20 26 28 35 40 41 52 56 65 67 70 82 91 104 130 134 140 164 169 182 205 260 268 280 287 328 335 338 364 410 455 469 520 533 536 574 670 676 728 820 845 871 910 938 1066 1148 1183 1340 1352 1435 1640 1690 1742 1820 1876 2132 2296 2345 2366 2665 2680 2747 2870 3380 3484 3640 3731 3752 4264 4355 4690 4732 5330 5494 5740 5915 6097 6760 6929 6968 7462 8710 9380 9464 10660 10988 11323 11480 11830 12194 13735 13858 14924 17420 18655 18760 19229 21320 21976 22646 23660 24388 27470 27716 29848 30485 34645 34840 35711 37310 38458 45292 47320 48503 48776 54940 55432 56615 60970 69290 71422 74620 76916 79261 90584 96145 97006 109880 113230 121940 138580 142844 149240 153832 158522 178555 192290 194012 226460 242515 243880 249977 277160 285688 317044 357110 384580 388024 396305 452920 464243 485030 499954 634088 714220 769160 792610 928486 970060 999908 1249885 1428440 1585220 1856972 1940120 1999816 2321215 2499770 3170440 3249701 3713944 4642430 4999540 6499402 9284860 9999080 12998804 16248505 18569720 25997608 32497010 64994020 129988040
• Sum of all divisors σ(n): 376306560
• Sum of proper divisors (its aliquot sum) s(n): 246318520
• 129988040 is an abundant number, because the sum of its proper divisors (246318520) is greater than itself. Its abundance is 116330480

Bases of 129988040

• Binary: 111101111110111010111001000₂
• Hexadecimal: 0x7BF75C8
• Base-36: 25E3EW

Squares and roots of 129988040

• 129988040 squared (129988040²) is 16896890543041600
• 129988040 cubed (129988040³) is 2196393683784513222464000
• The square root of 129988040 is 11401.2297582323
• The cube root of 129988040 is 506.5641663227

Scales and comparisons

• 129,988,040 seconds is equal to 4 years, 6 weeks, 6 days, 11 hours, 47 minutes, 20 seconds.
• To count from 1 to 129,988,040 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 129988040 cubic inches would be around 42.2 feet tall.

Recreational maths with 129988040

• 129988040 backwards is 040889921
• 129988040 is a Harshad number.
• The number of decimal digits it has is: 9
• The sum of 129988040's digits is 41
• More coming soon!