28021217840
28,021,217,840 is an even composite number composed of seven prime numbers multiplied together.
28021217840 is an even composite number. It is composed of seven distinct prime numbers multiplied together. It has a total of three hundred twenty divisors.
Prime factorization of 28021217840:
24 × 5 × 7 × 11 × 71 × 79 × 811
(2 × 2 × 2 × 2 × 5 × 7 × 11 × 71 × 79 × 811)See below for interesting mathematical facts about the number 28021217840 from the Numbermatics database.
Names of 28021217840
- Cardinal: 28021217840 can be written as Twenty-eight billion, twenty-one million, two hundred seventeen thousand, eight hundred forty.
Scientific notation
- Scientific notation: 2.802121784 × 1010
Factors of 28021217840
Divisors of 28021217840
- Number of divisors d(n): 320
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Complete list of divisors:
1 2 4 5 7 8 10 11 14 16 20 22 28 35 40 44 55 56 70 71 77 79 80 88 110 112 140 142 154 158 176 220 280 284 308 316 355 385 395 440 497 553 560 568 616 632 710 770 781 790 811 869 880 994 1106 1136 1232 1264 1420 1540 1562 1580 1622 1738 1988 2212 2485 2765 2840 3080 3124 3160 3244 3476 3905 3976 4055 4345 4424 4970 5467 5530 5609 5677 5680 6083 6160 6248 6320 6488 6952 7810 7952 8110 8690 8848 8921 9940 10934 11060 11218 11354 12166 12496 12976 13904 15620 16220 17380 17842 19880 21868 22120 22436 22708 24332 27335 28045 28385 30415 31240 32440 34760 35684 39263 39760 43736 44240 44605 44872 45416 48664 54670 56090 56770 57581 60830 61699 62447 62480 64069 64880 69520 71368 78526 87472 89210 89744 90832 97328 109340 112180 113540 115162 121660 123398 124894 128138 142736 157052 178420 196315 218680 224360 227080 230324 243320 246796 249788 256276 287905 308495 312235 314104 320345 356840 392630 403067 431893 437360 448483 448720 454160 460648 486640 493592 499576 512552 575810 616990 624470 628208 633391 640690 704759 713680 785260 806134 863786 896966 921296 987184 999152 1025104 1151620 1233980 1248940 1266782 1281380 1409518 1570520 1612268 1727572 1793932 2015335 2159465 2242415 2303240 2467960 2497880 2533564 2562760 2819036 3141040 3166955 3224536 3455144 3523795 3587864 4030670 4318930 4433737 4484830 4548899 4606480 4933313 4935920 4995760 5067128 5125520 5638072 6333910 6449072 6910288 7047590 7175728 8061340 8637860 8867474 8969660 9097798 9866626 10134256 11276144 12667820 14095180 16122680 17275720 17734948 17939320 18195596 19733252 22168685 22744495 24666565 25335640 28190360 31842293 32245360 34551440 35469896 35878640 36391192 39466504 44337370 45488990 49333130 50037889 50671280 56380720 63684586 70939792 72782384 78933008 88674740 90977980 98666260 100075778 127369172 159211465 177349480 181955960 197332520 200151556 250189445 254738344 318422930 350265223 354698960 363911920 394665040 400303112 500378890 509476688 636845860 700530446 800606224 1000757780 1273691720 1401060892 1751326115 2001515560 2547383440 2802121784 3502652230 4003031120 5604243568 7005304460 14010608920 28021217840
- Sum of all divisors σ(n): 83514654720
- Sum of proper divisors (its aliquot sum) s(n): 55493436880
- 28021217840 is an abundant number, because the sum of its proper divisors (55493436880) is greater than itself. Its abundance is 27472219040
Bases of 28021217840
- Binary: 110100001100011000111011010001100002
- Hexadecimal: 0x68631DA30
- Base-36: CVF3Y28
Squares and roots of 28021217840
- 28021217840 squared (280212178402) is 785188649236734265600
- 28021217840 cubed (280212178403) is 22001942185757880586570018304000
-
The
square root of 28021217840 is 167395.3937239613 -
The
cube root of 28021217840 is 3037.3558003429
Scales and comparisons
How big is 28021217840?- 28,021,217,840 seconds is equal to 890 years, 51 weeks, 2 days, 15 hours, 37 minutes, 20 seconds.
-
To count from 1 to 28,021,217,840 would take you about one thousand, seven hundred eighty-one 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 28021217840 cubic inches would be around 253.1 feet tall.
Recreational maths with 28021217840
- 28021217840 backwards is 04871212082
- 28021217840 is a
Harshad number . - The number of decimal digits it has is: 11
- The sum of 28021217840's digits is 35
- More coming soon!
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