138721280
138,721,280 is an even composite number composed of five prime numbers multiplied together.
138721280 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of one hundred ninety-two divisors.
Prime factorization of 138721280:
211 × 5 × 19 × 23 × 31
(2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 5 × 19 × 23 × 31)See below for interesting mathematical facts about the number 138721280 from the Numbermatics database.
Names of 138721280
- Cardinal: 138721280 can be written as One hundred thirty-eight million, seven hundred twenty-one thousand, two hundred eighty.
Scientific notation
- Scientific notation: 1.3872128 × 108
Factors of 138721280
Divisors of 138721280
- Number of divisors d(n): 192
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Complete list of divisors:
1 2 4 5 8 10 16 19 20 23 31 32 38 40 46 62 64 76 80 92 95 115 124 128 152 155 160 184 190 230 248 256 304 310 320 368 380 437 460 496 512 589 608 620 640 713 736 760 874 920 992 1024 1178 1216 1240 1280 1426 1472 1520 1748 1840 1984 2048 2185 2356 2432 2480 2560 2852 2944 2945 3040 3496 3565 3680 3968 4370 4712 4864 4960 5120 5704 5888 5890 6080 6992 7130 7360 7936 8740 9424 9728 9920 10240 11408 11776 11780 12160 13547 13984 14260 14720 15872 17480 18848 19456 19840 22816 23552 23560 24320 27094 27968 28520 29440 31744 34960 37696 38912 39680 45632 47104 47120 48640 54188 55936 57040 58880 63488 67735 69920 75392 79360 91264 94240 97280 108376 111872 114080 117760 135470 139840 150784 158720 182528 188480 194560 216752 223744 228160 235520 270940 279680 301568 317440 365056 376960 433504 447488 456320 541880 559360 603136 730112 753920 867008 894976 912640 1083760 1118720 1206272 1460224 1507840 1734016 1825280 2167520 2237440 3015680 3468032 3650560 4335040 4474880 6031360 6936064 7301120 8670080 13872128 17340160 27744256 34680320 69360640 138721280
- Sum of all divisors σ(n): 377395200
- Sum of proper divisors (its aliquot sum) s(n): 238673920
- 138721280 is an abundant number, because the sum of its proper divisors (238673920) is greater than itself. Its abundance is 99952640
Bases of 138721280
- Binary: 10000100010010111000000000002
- Hexadecimal: 0x844B800
- Base-36: 2ALA0W
Squares and roots of 138721280
- 138721280 squared (1387212802) is 19243593524838400
- 138721280 cubed (1387212803) is 2669495925565294641152000
-
The
square root of 138721280 is 11777.9998301917 -
The
cube root of 138721280 is 517.6636805553
Scales and comparisons
How big is 138721280?- 138,721,280 seconds is equal to 4 years, 21 weeks, 2 days, 13 hours, 41 minutes, 20 seconds.
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To count from 1 to 138,721,280 would take you about six 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 138721280 cubic inches would be around 43.1 feet tall.
Recreational maths with 138721280
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