640000000
640,000,000 is an even composite number composed of two prime numbers multiplied together.
640000000 is an even composite number. It is composed of two distinct prime numbers multiplied together. It has a total of one hundred twelve divisors.
Prime factorization of 640000000:
213 × 57
(2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 5 × 5 × 5 × 5 × 5 × 5 × 5)See below for interesting mathematical facts about the number 640000000 from the Numbermatics database.
Names of 640000000
- Cardinal: 640000000 can be written as Six hundred forty million.
Scientific notation
- Scientific notation: 6.4 × 108
Factors of 640000000
Divisors of 640000000
- Number of divisors d(n): 112
-
Complete list of divisors:
1 2 4 5 8 10 16 20 25 32 40 50 64 80 100 125 128 160 200 250 256 320 400 500 512 625 640 800 1000 1024 1250 1280 1600 2000 2048 2500 2560 3125 3200 4000 4096 5000 5120 6250 6400 8000 8192 10000 10240 12500 12800 15625 16000 20000 20480 25000 25600 31250 32000 40000 40960 50000 51200 62500 64000 78125 80000 100000 102400 125000 128000 156250 160000 200000 204800 250000 256000 312500 320000 400000 500000 512000 625000 640000 800000 1000000 1024000 1250000 1280000 1600000 2000000 2500000 2560000 3200000 4000000 5000000 5120000 6400000 8000000 10000000 12800000 16000000 20000000 25600000 32000000 40000000 64000000 80000000 128000000 160000000 320000000 640000000
- Sum of all divisors σ(n): 1599898248
- Sum of proper divisors (its aliquot sum) s(n): 959898248
- 640000000 is an abundant number, because the sum of its proper divisors (959898248) is greater than itself. Its abundance is 319898248
Bases of 640000000
- Binary: 1001100010010110100000000000002
- Hexadecimal: 0x2625A000
- Base-36: AL1F5S
Squares and roots of 640000000
- 640000000 squared (6400000002) is 409600000000000000
- 640000000 cubed (6400000003) is 262144000000000000000000000
-
The
square root of 640000000 is 25298.2212813471 -
The
cube root of 640000000 is 861.7738760127
Scales and comparisons
How big is 640000000?- 640,000,000 seconds is equal to 20 years, 18 weeks, 1 day, 9 hours, 46 minutes, 40 seconds.
-
To count from 1 to 640,000,000 would take you about thirty 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 640000000 cubic inches would be around 71.8 feet tall.
Recreational maths with 640000000
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