1081132863840000
1,081,132,863,840,000 is an even composite number composed of five prime numbers multiplied together.
1081132863840000 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of two thousand, one hundred sixty divisors.
Prime factorization of 1081132863840000:
28 × 33 × 54 × 412 × 533
(2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 3 × 3 × 3 × 5 × 5 × 5 × 5 × 41 × 41 × 53 × 53 × 53)See below for interesting mathematical facts about the number 1081132863840000 from the Numbermatics database.
Names of 1081132863840000
- Cardinal: 1081132863840000 can be written as One quadrillion, eighty-one trillion, one hundred thirty-two billion, eight hundred sixty-three million, eight hundred forty thousand.
Scientific notation
- Scientific notation: 1.08113286384 × 1015
Factors of 1081132863840000
Divisors of 1081132863840000
- Number of divisors d(n): 2160
-
Complete list of divisors:
1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 25 27 30 32 36 40 41 45 48 50 53 54 60 64 72 75 80 82 90 96 100 106 108 120 123 125 128 135 144 150 159 160 164 180 192 200 205 212 216 225 240 246 250 256 265 270 288 300 318 320 328 360 369 375 384 400 410 424 432 450 477 480 492 500 530 540 576 600 615 625 636 640 656 675 720 738 750 768 795 800 820 848 864 900 954 960 984 1000 1025 1060 1080 1107 1125 1152 1200 1230 1250 1272 1280 1312 1325 1350 1431 1440 1476 1500 1590 1600 1640 1681 1696 1728 1800 1845 1875 1908 1920 1968 2000 2050 2120 2160 2173 2214 2250 2304 2385 2400 2460 2500 2544 2624 2650 2700 2809 2862 2880 2952 3000 3075 3180 3200 3280 3362 3375 3392 3456 3600 3690 3750 3816 3840 3936 3975 4000 4100 4240 4320 4346 4428 4500 4770 4800 4920 5000 5043 5088 5125 5248 5300 5400 5535 5618 5625 5724 5760 5904 6000 6150 6360 6400 6519 6560 6625 6724 6750 6784 6912 7155 7200 7380 7500 7632 7872 7950 8000 8200 8405 8427 8480 8640 8692 8856 9000 9225 9540 9600 9840 10000 10086 10176 10250 10496 10600 10800 10865 11070 11236 11250 11448 11520 11808 11925 12000 12300 12720 13038 13120 13250 13448 13500 13568 14045 14310 14400 14760 15000 15129 15264 15375 15744 15900 16000 16400 16810 16854 16875 16960 17280 17384 17712 18000 18450 19080 19200 19557 19680 19875 20000 20172 20352 20500 21200 21600 21730 22140 22472 22500 22896 23616 23850 24000 24600 25215 25281 25440 25625 26076 26240 26500 26896 27000 27675 28090 28620 28800 29520 30000 30258 30528 30750 31488 31800 32000 32595 32800 33125 33620 33708 33750 33920 34560 34768 35424 35775 36000 36900 38160 39114 39360 39750 40000 40344 40704 41000 42025 42135 42400 43200 43460 44280 44944 45000 45387 45792 46125 47232 47700 48000 49200 50430 50562 50880 51250 52152 52480 53000 53792 54000 54325 55350 56180 57240 57600 58671 59040 59625 60000 60516 61056 61500 63600 65190 65600 66250 67240 67416 67500 67840 69536 70225 70848 71550 72000 73800 75645 75843 76320 76875 78228 78720 79500 80000 80688 82000 84050 84270 84800 86400 86920 88560 89093 89888 90000 90774 91584 92250 94464 95400 96000 97785 98400 99375 100860 101124 101760 102500 104304 106000 107584 108000 108650 110700 112360 114480 115169 117342 118080 119250 120000 121032 122112 123000 126075 126405 127200 130380 131200 132500 134480 134832 135000 138375 139072 140450 141696 143100 144000 147600 148877 151290 151686 152640 153750 156456 157440 159000 160000 161376 162975 164000 168100 168540 169600 172800 173840 177120 178186 178875 179776 180000 181548 183168 184500 190800 195570 196800 198750 201720 202248 203520 205000 208608 210125 210675 212000 215168 216000 217300 221400 224720 226935 228960 230338 230625 234684 236160 238500 240000 242064 246000 252150 252810 254400 260760 262400 265000 267279 268960 269664 270000 271625 276750 278144 280900 283392 286200 288000 293355 295200 297754 298125 302580 303372 305280 307500 312912 318000 322752 325950 328000 336200 337080 339200 345507 347680 351125 354240 356372 357750 359552 360000 363096 366336 369000 378225 379215 381600 391140 393600 397500 403440 404496 410000 417216 420250 421350 424000 430336 432000 434600 442800 445465 446631 449440 453870 457920 460676 461250 469368 472320 477000 480000 484128 488925 492000 504300 505620 508800 521520 530000 534558 537920 539328 540000 543250 553500 556288 561800 572400 575845 586710 590400 595508 596250 605160 606744 610560 615000 625824 630375 632025 636000 645504 651900 656000 672400 674160 691014 691875 695360 702250 708480 712744 715500 719104 720000 726192 738000 744385 756450 758430 763200 782280 787200 795000 801837 806880 808992 814875 820000 834432 840500 842700 848000 864000 869200 885600 890930 893262 894375 898880 907740 915840 921352 922500 938736 954000 968256 977850 984000 1008600 1011240 1017600 1036521 1043040 1050625 1053375 1060000 1069116 1075840 1078656 1080000 1086500 1107000 1123600 1134675 1144800 1151690 1173420 1180800 1191016 1192500 1210320 1213488 1230000 1251648 1260750 1264050 1272000 1291008 1303800 1312000 1336395 1339893 1344800 1348320 1358125 1382028 1383750 1390720 1404500 1416960 1425488 1431000 1440000 1452384 1466775 1476000 1488770 1512900 1516860 1526400 1564560 1590000 1603674 1613760 1617984 1629750 1640000 1668864 1681000 1685400 1696000 1727535 1738400 1755625 1771200 1781860 1786524 1788750 1797760 1815480 1831680 1842704 1845000 1877472 1891125 1896075 1908000 1936512 1955700 1968000 2017200 2022480 2073042 2086080 2101250 2106750 2120000 2138232 2151680 2157312 2160000 2173000 2214000 2227325 2233155 2247200 2269350 2289600 2303380 2346840 2361600 2382032 2385000 2405511 2420640 2426976 2444625 2460000 2503296 2521500 2528100 2544000 2607600 2672790 2679786 2689600 2696640 2716250 2764056 2767500 2781440 2809000 2850976 2862000 2879225 2904768 2933550 2952000 2977540 3025800 3033720 3052800 3109563 3129120 3151875 3160125 3180000 3207348 3227520 3235968 3259500 3280000 3362000 3370800 3455070 3476800 3511250 3542400 3563720 3573048 3577500 3595520 3630960 3685408 3690000 3721925 3754944 3782250 3792150 3816000 3873024 3911400 3936000 4009185 4019679 4034400 4044960 4074375 4146084 4172160 4202500 4213500 4240000 4276464 4320000 4346000 4428000 4454650 4466310 4494400 4538700 4579200 4606760 4693680 4721929 4764064 4770000 4811022 4841280 4853952 4889250 4920000 5006592 5043000 5056200 5088000 5182605 5215200 5266875 5345580 5359572 5379200 5393280 5432500 5528112 5535000 5618000 5673375 5701952 5724000 5758450 5809536 5867100 5904000 5955080 6051600 6067440 6103957 6219126 6258240 6303750 6320250 6360000 6414696 6455040 6471936 6519000 6560000 6681975 6699465 6724000 6741600 6910140 6953600 7022500 7084800 7127440 7146096 7155000 7261920 7333875 7370816 7380000 7443850 7509888 7564500 7584300 7632000 7822800 8018370 8039358 8068800 8089920 8148750 8292168 8344320 8405000 8427000 8480000 8552928 8637675 8692000 8856000 8909300 8932620 8988800 9077400 9158400 9213520 9387360 9443858 9455625 9480375 9528128 9540000 9622044 9682560 9707904 9778500 9840000 10086000 10112400 10365210 10430400 10533750 10691160 10719144 10758400 10786560 10865000 11056224 11070000 11136625 11165775 11236000 11346750 11403904 11448000 11516900 11619072 11734200 11808000 11910160 12027555 12103200 12134880 12207914 12223125 12438252 12516480 12607500 12640500 12720000 12829392 13038000 13363950 13398930 13448000 13483200 13820280 13907200 14045000 14165787 14254880 14292192 14310000 14396125 14523840 14667750 14741632 14760000 14887700 15019776 15129000 15168600 15264000 15547815 15645600 15800625 16036740 16078716 16137600 16179840 16297500 16584336 16810000 16854000 17105856 17275350 17384000 17712000 17818600 17865240 17977600 18154800 18311871 18427040 18609625 18774720 18887716 18911250 18960750 19056256 19080000 19244088 19365120 19415808 19557000 19680000 20045925 20098395 20172000 20224800 20730420 20860800 21067500 21382320 21438288 21730000 22112448 22140000 22273250 22331550 22472000 22693500 22807808 22896000 23033800 23468400 23609645 23820320 24055110 24206400 24269760 24415828 24446250 24876504 25032960 25215000 25281000 25440000 25658784 25913025 26076000 26727900 26797860 26896000 26966400 27640560 28090000 28331574 28366875 28509760 28584384 28620000 28792250 29047680 29335500 29483264 29520000 29775400 30258000 30337200 30519785 31095630 31291200 31601250 32073480 32157432 32275200 32359680 32595000 33168672 33409875 33497325 33620000 33708000 34211712 34550700 34768000 35424000 35637200 35730480 36309600 36623742 36669375 36854080 37219250 37549440 37775432 37822500 37921500 38112512 38160000 38488176 39114000 40091850 40196790 40344000 40449600 41460840 41721600 42135000 42497361 42764640 42876576 43188375 43460000 44224896 44280000 44546500 44663100 44944000 45387000 45792000 46067600 46936800 47219290 47401875 47640640 48110220 48412800 48539520 48831656 48892500 49753008 50430000 50562000 51317568 51826050 52152000 53455800 53595720 53792000 53932800 54935613 55281120 55683125 55828875 56180000 56663148 56733750 57019520 57168768 57240000 57584500 58095360 58671000 59040000 59550800 60137775 60516000 60674400 61039570 62191260 62582400 63202500 64146960 64314864 65190000 66337344 66819750 66994650 67240000 67416000 68423424 69101400 69536000 70828935 71274400 71460960 71980625 72619200 73247484 73338750 73708160 74438500 75098880 75550864 75645000 75843000 76320000 76976352 77739075 78228000 80183700 80393580 80688000 80899200 82921680 84270000 84994722 85529280 85753152 86376750 86920000 88449792 88560000 89093000 89326200 89888000 90774000 91559355 92135200 93048125 93873600 94438580 94803750 95281280 96220440 96825600 97079040 97663312 97785000 99506016 100229625 100491975 100860000 101124000 102635136 103652100 104304000 106911600 107191440 109871226 110562240 111366250 111657750 112360000 113326296 113467500 114039040 114337536 114480000 115169000 117342000 118048225 119101600 120275550 121032000 121348800 122079140 124382520 125164800 126405000 127492083 128293920 128629728 129565125 130380000 132674688 133639500 133989300 134480000 134832000 138202800 141657870 142548800 142921920 143961250 145238400 146494968 146677500 147416320 148877000 151101728 151290000 151686000 152598925 153952704 155478150 156456000 160367400 160787160 161376000 161798400 164806839 165843360 167049375 167486625 168540000 169989444 171058560 171506304 172753500 173840000 177120000 178186000 178652400 181548000 183118710 184270400 186096250 187747200 188877160 189607500 190562560 192440880 195326624 195570000 199012032 200459250 200983950 201720000 202248000 205270272 207304200 208608000 212486805 213823200 214382880 215941875 219742452 221124480 222732500 223315500 224720000 226652592 226935000 228960000 230338000 234684000 236096450 238203200 240551100 242064000 242697600 244158280 248765040 250262237 252810000 254984166 256587840 257259456 259130250 260760000 265349376 267279000 267978600 268960000 269664000 274678065 276405600 279144375 283315740 285097600 285843840 287922500 290476800 292989936 293355000 297754000 300688875 302203456 302580000 303372000 305197850 307905408 310956300 312912000 320734800 321574320 329613678 331686720 334098750 334973250 337080000 339978888 342117120 343012608 345507000 347680000 354144675 356372000 357304800 363096000 366237420 368540800 372192500 375494400 377754320 379215000 384881760 388695375 390653248 391140000 398024064 400918500 401967900 403440000 404496000 414608400 424973610 427646400 428765760 431883750 439484904 442248960 445465000 446631000 449440000 453305184 453870000 457796775 460676000 469368000 472192900 476406400 481102200 484128000 485395200 488316560 497530080 500524474 501148125 502459875 505620000 509968332 513175680 514518912 518260500 521520000 534558000 535957200 549356130 552811200 558288750 566631480 570195200 571687680 575845000 585979872 586710000 590241125 595508000 601377750 604406912 605160000 606744000 610395700 615810816 621912600 625824000 637460415 641469600 643148640 647825625 659227356 663373440 668197500 669946500 674160000 679957776 691014000 708289350 712744000 714609600 726192000 732474840 737081600 744385000 750786711 755508640 758430000 762994625 769763520 777390750 781306496 782280000 796048128 801837000 803935800 806880000 808992000 824034195 829216800 837433125 849947220 855292800 857531520 863767500 878969808 890930000 893262000 906610368 907740000 915593550 921352000 938736000 944385800 952812800 962204400 976633120 995060160 1001048948 1002296250 1004919750 1011240000 1019936664 1026351360 1029037824 1036521000 1043040000 1062434025 1069116000 1071914400 1098712260 1105622400 1116577500 1133262960 1151690000 1171959744 1173420000 1180482250 1191016000 1202755500 1208813824 1210320000 1213488000 1220791400 1243825200 1251311185 1274920830 1282939200 1286297280 1295651250 1318454712 1326746880 1336395000 1339893000 1348320000 1359915552 1373390325 1382028000 1416578700 1425488000 1429219200 1452384000 1464949680 1488770000 1501573422 1503444375 1511017280 1516860000 1525989250 1539527040 1554781500 1562612992 1564560000 1603674000 1607871600 1648068390 1658433600 1674866250 1699894440 1710585600 1715063040 1727535000 1757939616 1770723375 1781860000 1786524000 1813220736 1815480000 1831187100 1842704000 1877472000 1888771600 1924408800 1943476875 1953266240 1990120320 2002097896 2004592500 2009839500 2022480000 2039873328 2073042000 2124868050 2138232000 2143828800 2197424520 2211244800 2233155000 2252360133 2266525920 2288983875 2303380000 2343919488 2346840000 2360964500 2382032000 2405511000 2420640000 2426976000 2441582800 2487650400 2502622370 2512299375 2549841660 2565878400 2572594560 2591302500 2636909424 2672790000 2679786000 2719831104 2746780650 2764056000 2833157400 2850976000 2858438400 2929899360 2951205625 2977540000 3003146844 3006888750 3022034560 3033720000 3051978500 3079054080 3109563000 3129120000 3187302075 3207348000 3215743200 3296136780 3316867200 3349732500 3399788880 3455070000 3515879232 3541446750 3563720000 3573048000 3626441472 3630960000 3662374200 3685408000 3753933555 3777543200 3814973125 3848817600 3886953750 3906532480 3980240640 4004195792 4009185000 4019679000 4044960000 4079746656 4120170975 4146084000 4249736100 4276464000 4287657600 4394849040 4466310000 4504720266 4533051840 4577967750 4606760000 4687838976 4693680000 4721929000 4764064000 4811022000 4883165600 4975300800 5005244740 5024598750 5099683320 5131756800 5145189120 5182605000 5273818848 5312170125 5345580000 5359572000 5439662208 5493561300 5528112000 5666314800 5859798720 5902411250 5955080000 6006293688 6013777500 6044069120 6067440000 6103957000 6219126000 6256555925 6374604150 6414696000 6431486400 6592273560 6633734400 6699465000 6757080399 6799577760 6866951625 6910140000 7031758464 7082893500 7127440000 7146096000 7261920000 7324748400 7507867110 7555086400 7629946250 7697635200 7773907500 7813064960 8008391584 8018370000 8039358000 8159493312 8240341950 8292168000 8499472200 8552928000 8575315200 8789698080 8853616875 8932620000 9009440532 9066103680 9155935500 9213520000 9387360000 9443858000 9622044000 9766331200 9950601600 10010489480 10049197500 10199366640 10365210000 10547637696 10624340250 10691160000 10719144000 10879324416 10987122600 11056224000 11261800665 11332629600 11444919375 11719597440 11804822500 11910160000 12012587376 12027555000 12134880000 12207914000 12438252000 12513111850 12749208300 12829392000 12862972800 13184547120 13398930000 13514160798 13599155520 13733903250 13820280000 14063516928 14165787000 14254880000 14292192000 14649496800 15015734220 15110172800 15259892500 15395270400 15547815000 15936510375 16016783168 16036740000 16078716000 16318986624 16480683900 16584336000 16998944400 17579396160 17707233750 17865240000 18018881064 18132207360 18311871000 18427040000 18769667775 18887716000 19244088000 19532662400 19901203200 20020978960 20098395000 20398733280 20600854875 20730420000 21095275392 21248680500 21382320000 21438288000 21974245200 22523601330 22665259200 22889838750 23439194880 23609645000 23820320000 24025174752 24055110000 24415828000 24876504000 25026223700 25498416600 25658784000 25725945600 26369094240 26560850625 26797860000 27028321596 27198311040 27467806500 27640560000 28331574000 29298993600 30031468440 30220345600 30519785000 31095630000 31282779625 31873020750 32033566336 32073480000 32157432000 32637973248 32961367800 33168672000 33785401995 33997888800 34334758125 35158792320 35414467500 35730480000 36037762128 36623742000 37539335550 37775432000 38488176000 39065324800 40041957920 40196790000 40797466560 41201709750 41460840000 42190550784 42497361000 42764640000 42876576000 43948490400 45047202660 45330518400 45779677500 47219290000 48050349504 48110220000 48831656000 49753008000 50052447400 50996833200 52738188480 53121701250 53595720000 54056643192 54396622080 54935613000 55281120000 56309003325 56663148000 58597987200 60062936880 61039570000 62191260000 62565559250 63746041500 64067132672 64146960000 64314864000 65922735600 67570803990 67995777600 68669516250 70317584640 70828935000 71460960000 72075524256 73247484000 75078671100 75550864000 76976352000 79682551875 80083915840 80393580000 81594933120 82403419500 82921680000 84994722000 87896980800 90094405320 90661036800 91559355000 93848338875 94438580000 96100699008 96220440000 97663312000 99506016000 100104894800 101993666400 103004274375 105476376960 106243402500 107191440000 108113286384 109871226000 112618006650 113326296000 117195974400 120125873760 122079140000 124382520000 125131118500 127492083000 128293920000 128629728000 131845471200 135141607980 135991555200 137339032500 141657870000 144151048512 146494968000 150157342200 151101728000 156413898125 159365103750 160167831680 160787160000 163189866240 164806839000 165843360000 168927009975 169989444000 175793961600 180188810640 183118710000 187696677750 188877160000 192201398016 192440880000 195326624000 200209789600 203987332800 206008548750 210952753920 212486805000 214382880000 216226572768 219742452000 225236013300 226652592000 240251747520 244158280000 248765040000 250262237000 254984166000 263690942400 270283215960 271983110400 274678065000 281545016625 283315740000 288302097024 292989936000 300314684400 312827796250 318730207500 320335663360 321574320000 329613678000 337854019950 339978888000 351587923200 360377621280 366237420000 375393355500 377754320000 384881760000 400419579200 407974665600 412017097500 424973610000 432453145536 439484904000 450472026600 453305184000 469241694375 480503495040 488316560000 497530080000 500524474000 509968332000 527381884800 540566431920 549356130000 563090033250 566631480000 576604194048 585979872000 600629368800 625655592500 637460415000 643148640000 659227356000 675708039900 679957776000 720755242560 732474840000 750786711000 755508640000 800839158400 815949331200 824034195000 844635049875 849947220000 864906291072 878969808000 900944053200 938483388750 961006990080 976633120000 1001048948000 1019936664000 1054763769600 1081132863840 1098712260000 1126180066500 1133262960000 1201258737600 1251311185000 1274920830000 1318454712000 1351416079800 1359915552000 1407725083125 1441510485120 1464949680000 1501573422000 1601678316800 1648068390000 1689270099750 1699894440000 1729812582144 1757939616000 1801888106400 1876966777500 2002097896000 2039873328000 2162265727680 2197424520000 2252360133000 2266525920000 2402517475200 2502622370000 2549841660000 2636909424000 2702832159600 2815450166250 2883020970240 2929899360000 3003146844000 3296136780000 3378540199500 3399788880000 3603776212800 3753933555000 4004195792000 4079746656000 4223175249375 4324531455360 4394849040000 4504720266000 4805034950400 5005244740000 5099683320000 5273818848000 5405664319200 5630900332500 6006293688000 6592273560000 6757080399000 6799577760000 7207552425600 7507867110000 8008391584000 8446350498750 8649062910720 8789698080000 9009440532000 10010489480000 10199366640000 10811328638400 11261800665000 12012587376000 13184547120000 13514160798000 14415104851200 15015734220000 16892700997500 18018881064000 20020978960000 20398733280000 21622657276800 22523601330000 24025174752000 26369094240000 27028321596000 30031468440000 33785401995000 36037762128000 40041957920000 43245314553600 45047202660000 54056643192000 60062936880000 67570803990000 72075524256000 90094405320000 108113286384000 120125873760000 135141607980000 180188810640000 216226572768000 270283215960000 360377621280000 540566431920000 1081132863840000
- Sum of all divisors σ(n): 4173662069992800
- Sum of proper divisors (its aliquot sum) s(n): 3092529206152800
- 1081132863840000 is an abundant number, because the sum of its proper divisors (3092529206152800) is greater than itself. Its abundance is 2011396342312800
Bases of 1081132863840000
- Binary: 111101011101001000110111000100110111011111000000002
- Hexadecimal: 0x3D748DC4DDF00
- Base-36: AN89KX3UO0
Squares and roots of 1081132863840000
- 1081132863840000 squared (10811328638400002) is 1168848269274879979545600000000
- 1081132863840000 cubed (10811328638400003) is 1263680276755578472458415149871104000000000000
-
The
square root of 1081132863840000 is 32880584.9072062585 -
The
cube root of 1081132863840000 is 102634.4177817413
Scales and comparisons
How big is 1081132863840000?- 1,081,132,863,840,000 seconds is equal to 34,376,680 years, 47 weeks, 1 day.
-
To count from 1 to 1,081,132,863,840,000 would take you about one hundred three million, one hundred thirty thousand and forty-two 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 1081132863840000 cubic inches would be around 8552.9 feet tall.
Recreational maths with 1081132863840000
- 1081132863840000 backwards is 0000483682311801
- 1081132863840000 is a
Harshad number . - The number of decimal digits it has is: 16
- The sum of 1081132863840000's digits is 45
- More coming soon!
Link to this page
HTML: To link to this page, just copy and paste the link below into your blog, web page or email.
BBCODE: To link to this page in a forum post or comment box, just copy and paste the link code below:
Cite this page
MLA style:
"Number 1081132863840000 - Facts about the integer". Numbermatics.com. 2024. Web. 2 May 2024.
APA style:
Numbermatics. (2024). Number 1081132863840000 - Facts about the integer. Retrieved 2 May 2024, from https://numbermatics.com/n/1081132863840000/
Chicago style:
Numbermatics. 2024. "Number 1081132863840000 - Facts about the integer". https://numbermatics.com/n/1081132863840000/
The information we have on file for 1081132863840000 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!
Keywords: Divisors of 1081132863840000, math, Factors of 1081132863840000, curriculum, school, college, exams, university, Prime factorization of 1081132863840000, STEM, science, technology, engineering, physics, economics, calculator, one quadrillion, eighty-one trillion, one hundred thirty-two billion, eight hundred sixty-three million, eight hundred forty thousand.