1221390720
1,221,390,720 is an even composite number composed of six prime numbers multiplied together.
1221390720 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of three hundred eighty-four divisors.
Prime factorization of 1221390720:
27 × 32 × 5 × 11 × 37 × 521
(2 × 2 × 2 × 2 × 2 × 2 × 2 × 3 × 3 × 5 × 11 × 37 × 521)See below for interesting mathematical facts about the number 1221390720 from the Numbermatics database.
Names of 1221390720
- Cardinal: 1221390720 can be written as One billion, two hundred twenty-one million, three hundred ninety thousand, seven hundred twenty.
Scientific notation
- Scientific notation: 1.22139072 × 109
Factors of 1221390720
Divisors of 1221390720
- Number of divisors d(n): 384
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Complete list of divisors:
1 2 3 4 5 6 8 9 10 11 12 15 16 18 20 22 24 30 32 33 36 37 40 44 45 48 55 60 64 66 72 74 80 88 90 96 99 110 111 120 128 132 144 148 160 165 176 180 185 192 198 220 222 240 264 288 296 320 330 333 352 360 370 384 396 407 440 444 480 495 521 528 555 576 592 640 660 666 704 720 740 792 814 880 888 960 990 1042 1056 1110 1152 1184 1221 1320 1332 1408 1440 1480 1563 1584 1628 1665 1760 1776 1920 1980 2035 2084 2112 2220 2368 2442 2605 2640 2664 2880 2960 3126 3168 3256 3330 3520 3552 3663 3960 4070 4168 4224 4440 4689 4736 4884 5210 5280 5328 5731 5760 5920 6105 6252 6336 6512 6660 7040 7104 7326 7815 7920 8140 8336 8880 9378 9768 10420 10560 10656 11462 11840 12210 12504 12672 13024 13320 14208 14652 15630 15840 16280 16672 17193 17760 18315 18756 19277 19536 20840 21120 21312 22924 23445 23680 24420 25008 26048 26640 28655 29304 31260 31680 32560 33344 34386 35520 36630 37512 38554 39072 41680 42624 45848 46890 48840 50016 51579 52096 53280 57310 57831 58608 62520 63360 65120 66688 68772 71040 73260 75024 77108 78144 83360 85965 91696 93780 96385 97680 100032 103158 106560 114620 115662 117216 125040 130240 137544 146520 150048 154216 156288 166720 171930 173493 183392 187560 192770 195360 200064 206316 212047 213120 229240 231324 234432 250080 257895 260480 275088 289155 293040 300096 308432 333440 343860 346986 366784 375120 385540 390720 412632 424094 458480 462648 468864 500160 515790 550176 578310 586080 600192 616864 636141 687720 693972 733568 750240 771080 781440 825264 848188 867465 916960 925296 1000320 1031580 1060235 1100352 1156620 1172160 1233728 1272282 1375440 1387944 1500480 1542160 1650528 1696376 1734930 1833920 1850592 1908423 2063160 2120470 2200704 2313240 2344320 2467456 2544564 2750880 2775888 3000960 3084320 3180705 3301056 3392752 3469860 3667840 3701184 3816846 4126320 4240940 4626480 5089128 5501760 5551776 6168640 6361410 6602112 6785504 6939720 7402368 7633692 8252640 8481880 9252960 9542115 10178256 11003520 11103552 12337280 12722820 13571008 13879440 15267384 16505280 16963760 18505920 19084230 20356512 22207104 25445640 27142016 27758880 30534768 33010560 33927520 37011840 38168460 40713024 50891280 55517760 61069536 67855040 76336920 81426048 101782560 111035520 122139072 135710080 152673840 203565120 244278144 305347680 407130240 610695360 1221390720
- Sum of all divisors σ(n): 4734456480
- Sum of proper divisors (its aliquot sum) s(n): 3513065760
- 1221390720 is an abundant number, because the sum of its proper divisors (3513065760) is greater than itself. Its abundance is 2291675040
Bases of 1221390720
- Binary: 10010001100110011110001100000002
- Hexadecimal: 0x48CCF180
- Base-36: K76N40
Squares and roots of 1221390720
- 1221390720 squared (12213907202) is 1491795290902118400
- 1221390720 cubed (12213907203) is 1822064924447547842101248000
-
The
square root of 1221390720 is 34948.4008217827 -
The
cube root of 1221390720 is 1068.9355939101
Scales and comparisons
How big is 1221390720?- 1,221,390,720 seconds is equal to 38 years, 43 weeks, 3 days, 11 hours, 12 minutes.
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To count from 1 to 1,221,390,720 would take you about seventy-seven 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 1221390720 cubic inches would be around 89.1 feet tall.
Recreational maths with 1221390720
- 1221390720 backwards is 0270931221
- The number of decimal digits it has is: 10
- The sum of 1221390720's digits is 27
- More coming soon!
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