81438398400
81,438,398,400 is an even composite number composed of five prime numbers multiplied together.
81438398400 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of two hundred fifty-two divisors.
Prime factorization of 81438398400:
26 × 3 × 52 × 412 × 10093
(2 × 2 × 2 × 2 × 2 × 2 × 3 × 5 × 5 × 41 × 41 × 10093)See below for interesting mathematical facts about the number 81438398400 from the Numbermatics database.
Names of 81438398400
- Cardinal: 81438398400 can be written as Eighty-one billion, four hundred thirty-eight million, three hundred ninety-eight thousand, four hundred.
Scientific notation
- Scientific notation: 8.14383984 × 1010
Factors of 81438398400
Divisors of 81438398400
- Number of divisors d(n): 252
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Complete list of divisors:
1 2 3 4 5 6 8 10 12 15 16 20 24 25 30 32 40 41 48 50 60 64 75 80 82 96 100 120 123 150 160 164 192 200 205 240 246 300 320 328 400 410 480 492 600 615 656 800 820 960 984 1025 1200 1230 1312 1600 1640 1681 1968 2050 2400 2460 2624 3075 3280 3362 3936 4100 4800 4920 5043 6150 6560 6724 7872 8200 8405 9840 10086 10093 12300 13120 13448 16400 16810 19680 20172 20186 24600 25215 26896 30279 32800 33620 39360 40344 40372 42025 49200 50430 50465 53792 60558 65600 67240 80688 80744 84050 98400 100860 100930 107584 121116 126075 134480 151395 161376 161488 168100 196800 201720 201860 242232 252150 252325 268960 302790 322752 322976 336200 403440 403720 413813 484464 504300 504650 537920 605580 645952 672400 756975 806880 807440 827626 968928 1008600 1009300 1211160 1241439 1344800 1513950 1613760 1614880 1655252 1937856 2017200 2018600 2069065 2422320 2482878 2689600 3027900 3229760 3310504 4034400 4037200 4138130 4844640 4965756 6055800 6207195 6621008 8068800 8074400 8276260 9689280 9931512 10345325 12111600 12414390 13242016 16148800 16552520 16966333 19863024 20690650 24223200 24828780 26484032 31035975 33105040 33932666 39726048 41381300 48446400 49657560 50898999 62071950 66210080 67865332 79452096 82762600 84831665 99315120 101797998 124143900 132420160 135730664 165525200 169663330 198630240 203595996 248287800 254494995 271461328 331050400 339326660 397260480 407191992 424158325 496575600 508989990 542922656 662100800 678653320 814383984 848316650 993151200 1017979980 1085845312 1272474975 1357306640 1628767968 1696633300 1986302400 2035959960 2544949950 2714613280 3257535936 3393266600 4071919920 5089899900 5429226560 6786533200 8143839840 10179799800 13573066400 16287679680 20359599600 27146132800 40719199200 81438398400
- Sum of all divisors σ(n): 273888617576
- Sum of proper divisors (its aliquot sum) s(n): 192450219176
- 81438398400 is an abundant number, because the sum of its proper divisors (192450219176) is greater than itself. Its abundance is 111011820776
Bases of 81438398400
- Binary: 10010111101100001101101010111110000002
- Hexadecimal: 0x12F61B57C0
- Base-36: 11EUBIDC
Squares and roots of 81438398400
- 81438398400 squared (814383984002) is 6632212733957122560000
- 81438398400 cubed (814383984003) is 540116782901553355558907904000000
-
The
square root of 81438398400 is 285374.1375808257 -
The
cube root of 81438398400 is 4334.5405951195
Scales and comparisons
How big is 81438398400?- 81,438,398,400 seconds is equal to 2,589 years, 25 weeks, 3 days, 1 hour, 20 minutes.
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To count from 1 to 81,438,398,400 would take you about five thousand, one hundred seventy-eight 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 81438398400 cubic inches would be around 361.2 feet tall.
Recreational maths with 81438398400
- 81438398400 backwards is 00489383418
- 81438398400 is a
Harshad number . - The number of decimal digits it has is: 11
- The sum of 81438398400's digits is 48
- More coming soon!
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