72989920
72,989,920 is an even composite number composed of four prime numbers multiplied together.
72989920 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of seventy-two divisors.
Prime factorization of 72989920:
25 × 5 × 43 × 1032
(2 × 2 × 2 × 2 × 2 × 5 × 43 × 103 × 103)See below for interesting mathematical facts about the number 72989920 from the Numbermatics database.
Names of 72989920
- Cardinal: 72989920 can be written as Seventy-two million, nine hundred eighty-nine thousand, nine hundred twenty.
Scientific notation
- Scientific notation: 7.298992 × 107
Factors of 72989920
Divisors of 72989920
- Number of divisors d(n): 72
-
Complete list of divisors:
1 2 4 5 8 10 16 20 32 40 43 80 86 103 160 172 206 215 344 412 430 515 688 824 860 1030 1376 1648 1720 2060 3296 3440 4120 4429 6880 8240 8858 10609 16480 17716 21218 22145 35432 42436 44290 53045 70864 84872 88580 106090 141728 169744 177160 212180 339488 354320 424360 456187 708640 848720 912374 1697440 1824748 2280935 3649496 4561870 7298992 9123740 14597984 18247480 36494960 72989920
- Sum of all divisors σ(n): 178178616
- Sum of proper divisors (its aliquot sum) s(n): 105188696
- 72989920 is an abundant number, because the sum of its proper divisors (105188696) is greater than itself. Its abundance is 32198776
Bases of 72989920
- Binary: 1000101100110111100111000002
- Hexadecimal: 0x459BCE0
- Base-36: 17GFDS
Squares and roots of 72989920
- 72989920 squared (729899202) is 5327528421606400
- 72989920 cubed (729899203) is 388855873290777407488000
-
The
square root of 72989920 is 8543.4138375711 -
The
cube root of 72989920 is 417.9146823421
Scales and comparisons
How big is 72989920?- 72,989,920 seconds is equal to 2 years, 16 weeks, 4 days, 18 hours, 58 minutes, 40 seconds.
-
To count from 1 to 72,989,920 would take you about three 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 72989920 cubic inches would be around 34.8 feet tall.
Recreational maths with 72989920
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