12138900
12,138,900 is an even composite number composed of five prime numbers multiplied together.
12138900 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of seventy-two divisors.
Prime factorization of 12138900:
22 × 3 × 52 × 43 × 941
(2 × 2 × 3 × 5 × 5 × 43 × 941)See below for interesting mathematical facts about the number 12138900 from the Numbermatics database.
Names of 12138900
- Cardinal: 12138900 can be written as Twelve million, one hundred thirty-eight thousand, nine hundred.
Scientific notation
- Scientific notation: 1.21389 × 107
Factors of 12138900
Divisors of 12138900
- Number of divisors d(n): 72
-
Complete list of divisors:
1 2 3 4 5 6 10 12 15 20 25 30 43 50 60 75 86 100 129 150 172 215 258 300 430 516 645 860 941 1075 1290 1882 2150 2580 2823 3225 3764 4300 4705 5646 6450 9410 11292 12900 14115 18820 23525 28230 40463 47050 56460 70575 80926 94100 121389 141150 161852 202315 242778 282300 404630 485556 606945 809260 1011575 1213890 2023150 2427780 3034725 4046300 6069450 12138900
- Sum of all divisors σ(n): 35976864
- Sum of proper divisors (its aliquot sum) s(n): 23837964
- 12138900 is an abundant number, because the sum of its proper divisors (23837964) is greater than itself. Its abundance is 11699064
Bases of 12138900
- Binary: 1011100100111001100101002
- Hexadecimal: 0xB93994
- Base-36: 786FO
Squares and roots of 12138900
- 12138900 squared (121389002) is 147352893210000
- 12138900 cubed (121389003) is 1788702035386869000000
-
The
square root of 12138900 is 3484.0924212771 -
The
cube root of 12138900 is 229.8227998717
Scales and comparisons
How big is 12138900?- 12,138,900 seconds is equal to 20 weeks, 11 hours, 55 minutes.
-
To count from 1 to 12,138,900 would take you about thirty weeks!
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 12138900 cubic inches would be around 19.2 feet tall.
Recreational maths with 12138900
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