145138840
145,138,840 is an even composite number composed of five prime numbers multiplied together.
145138840 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of sixty-four divisors.
Prime factorization of 145138840:
23 × 5 × 7 × 11 × 47123
(2 × 2 × 2 × 5 × 7 × 11 × 47123)See below for interesting mathematical facts about the number 145138840 from the Numbermatics database.
Names of 145138840
- Cardinal: 145138840 can be written as One hundred forty-five million, one hundred thirty-eight thousand, eight hundred forty.
Scientific notation
- Scientific notation: 1.4513884 × 108
Factors of 145138840
Divisors of 145138840
- Number of divisors d(n): 64
-
Complete list of divisors:
1 2 4 5 7 8 10 11 14 20 22 28 35 40 44 55 56 70 77 88 110 140 154 220 280 308 385 440 616 770 1540 3080 47123 94246 188492 235615 329861 376984 471230 518353 659722 942460 1036706 1319444 1649305 1884920 2073412 2591765 2638888 3298610 3628471 4146824 5183530 6597220 7256942 10367060 13194440 14513884 18142355 20734120 29027768 36284710 72569420 145138840
- Sum of all divisors σ(n): 407151360
- Sum of proper divisors (its aliquot sum) s(n): 262012520
- 145138840 is an abundant number, because the sum of its proper divisors (262012520) is greater than itself. Its abundance is 116873680
Bases of 145138840
- Binary: 10001010011010100100100110002
- Hexadecimal: 0x8A6A498
- Base-36: 2EETUG
Squares and roots of 145138840
- 145138840 squared (1451388402) is 21065282876545600
- 145138840 cubed (1451388403) is 3057390720973691591104000
-
The
square root of 145138840 is 12047.3582166383 -
The
cube root of 145138840 is 525.5264137913
Scales and comparisons
How big is 145138840?- 145,138,840 seconds is equal to 4 years, 31 weeks, 6 days, 20 hours, 20 minutes, 40 seconds.
-
To count from 1 to 145,138,840 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 145138840 cubic inches would be around 43.8 feet tall.
Recreational maths with 145138840
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