18000000
18,000,000 is an even composite number composed of three prime numbers multiplied together.
18000000 is an even composite number. It is composed of three distinct prime numbers multiplied together. It has a total of one hundred sixty-eight divisors.
Prime factorization of 18000000:
27 × 32 × 56
(2 × 2 × 2 × 2 × 2 × 2 × 2 × 3 × 3 × 5 × 5 × 5 × 5 × 5 × 5)See below for interesting mathematical facts about the number 18000000 from the Numbermatics database.
Names of 18000000
- Cardinal: 18000000 can be written as Eighteen million.
Scientific notation
- Scientific notation: 1.8 × 107
Factors of 18000000
Divisors of 18000000
- Number of divisors d(n): 168
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Complete list of divisors:
1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 25 30 32 36 40 45 48 50 60 64 72 75 80 90 96 100 120 125 128 144 150 160 180 192 200 225 240 250 288 300 320 360 375 384 400 450 480 500 576 600 625 640 720 750 800 900 960 1000 1125 1152 1200 1250 1440 1500 1600 1800 1875 1920 2000 2250 2400 2500 2880 3000 3125 3200 3600 3750 4000 4500 4800 5000 5625 5760 6000 6250 7200 7500 8000 9000 9375 9600 10000 11250 12000 12500 14400 15000 15625 16000 18000 18750 20000 22500 24000 25000 28125 28800 30000 31250 36000 37500 40000 45000 46875 48000 50000 56250 60000 62500 72000 75000 80000 90000 93750 100000 112500 120000 125000 140625 144000 150000 180000 187500 200000 225000 240000 250000 281250 300000 360000 375000 400000 450000 500000 562500 600000 720000 750000 900000 1000000 1125000 1200000 1500000 1800000 2000000 2250000 3000000 3600000 4500000 6000000 9000000 18000000
- Sum of all divisors σ(n): 64745265
- Sum of proper divisors (its aliquot sum) s(n): 46745265
- 18000000 is an abundant number, because the sum of its proper divisors (46745265) is greater than itself. Its abundance is 28745265
Bases of 18000000
- Binary: 10001001010101000100000002
- Hexadecimal: 0x112A880
- Base-36: APSW0
Squares and roots of 18000000
- 18000000 squared (180000002) is 324000000000000
- 18000000 cubed (180000003) is 5832000000000000000000
-
The
square root of 18000000 is 4242.6406871193 -
The
cube root of 18000000 is 262.0741394209 - Being both a perfect square and a perfect cube, 18000000 is also a
perfect sixth number .
Scales and comparisons
How big is 18000000?- 18,000,000 seconds is equal to 29 weeks, 5 days, 8 hours.
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To count from 1 to 18,000,000 would take you about forty-four 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 18000000 cubic inches would be around 21.8 feet tall.
Recreational maths with 18000000
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