81438400
81,438,400 is an even composite number composed of four prime numbers multiplied together.
What does the number 81438400 look like?
This visualization shows the relationship between its 4 prime factors (large circles) and 84 divisors.
81438400 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of eighty-four divisors.
Prime factorization of 81438400:
26 × 52 × 23 × 2213
(2 × 2 × 2 × 2 × 2 × 2 × 5 × 5 × 23 × 2213)See below for interesting mathematical facts about the number 81438400 from the Numbermatics database.
Names of 81438400
- Cardinal: 81438400 can be written as Eighty-one million, four hundred thirty-eight thousand, four hundred.
Scientific notation
- Scientific notation: 8.14384 × 107
Factors of 81438400
Divisors of 81438400
- Number of divisors d(n): 84
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Complete list of divisors:
1 2 4 5 8 10 16 20 23 25 32 40 46 50 64 80 92 100 115 160 184 200 230 320 368 400 460 575 736 800 920 1150 1472 1600 1840 2213 2300 3680 4426 4600 7360 8852 9200 11065 17704 18400 22130 35408 36800 44260 50899 55325 70816 88520 101798 110650 141632 177040 203596 221300 254495 354080 407192 442600 508990 708160 814384 885200 1017980 1272475 1628768 1770400 2035960 2544950 3257536 3540800 4071920 5089900 8143840 10179800 16287680 20359600 40719200 81438400
- Sum of all divisors σ(n): 209196432
- Sum of proper divisors (its aliquot sum) s(n): 127758032
- 81438400 is an abundant number, because the sum of its proper divisors (127758032) is greater than itself. Its abundance is 46319632
Bases of 81438400
- Binary: 1001101101010100110110000002
- Hexadecimal: 0x4DAA6C0
- Base-36: 1CHI9S
Squares and roots of 81438400
- 81438400 squared (814384002) is 6632212994560000
- 81438400 cubed (814384003) is 540116814736175104000000
-
The
square root of 81438400 is 9024.3226892659 -
The
cube root of 81438400 is 433.4540623505
Scales and comparisons
How big is 81438400?- 81,438,400 seconds is equal to 2 years, 30 weeks, 4 days, 13 hours, 46 minutes, 40 seconds.
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To count from 1 to 81,438,400 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 81438400 cubic inches would be around 36.1 feet tall.
Recreational maths with 81438400
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The information we have on file for 81438400 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!
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