389920905
389,920,905 is an odd composite number composed of five prime numbers multiplied together.
389920905 is an odd composite number. It is composed of five distinct prime numbers multiplied together. It has a total of sixty-four divisors.
Prime factorization of 389920905:
33 × 5 × 11 × 67 × 3919
(3 × 3 × 3 × 5 × 11 × 67 × 3919)See below for interesting mathematical facts about the number 389920905 from the Numbermatics database.
Names of 389920905
- Cardinal: 389920905 can be written as Three hundred eighty-nine million, nine hundred twenty thousand, nine hundred five.
Scientific notation
- Scientific notation: 3.89920905 × 108
Factors of 389920905
Divisors of 389920905
- Number of divisors d(n): 64
-
Complete list of divisors:
1 3 5 9 11 15 27 33 45 55 67 99 135 165 201 297 335 495 603 737 1005 1485 1809 2211 3015 3685 3919 6633 9045 11055 11757 19595 19899 33165 35271 43109 58785 99495 105813 129327 176355 215545 262573 387981 529065 646635 787719 1163943 1312865 1939905 2363157 2888303 3938595 5819715 7089471 8664909 11815785 14441515 25994727 35447355 43324545 77984181 129973635 389920905
- Sum of all divisors σ(n): 767692800
- Sum of proper divisors (its aliquot sum) s(n): 377771895
- 389920905 is a deficient number, because the sum of its proper divisors (377771895) is less than itself. Its deficiency is 12149010
Bases of 389920905
- Binary: 101110011110110111000100010012
- Hexadecimal: 0x173DB889
- Base-36: 6G5CW9
Squares and roots of 389920905
- 389920905 squared (3899209052) is 152038312156019025
- 389920905 cubed (3899209053) is 59282916270547439425217625
-
The
square root of 389920905 is 19746.4149910813 -
The
cube root of 389920905 is 730.5649626627
Scales and comparisons
How big is 389920905?- 389,920,905 seconds is equal to 12 years, 20 weeks, 4 days, 23 hours, 21 minutes, 45 seconds.
-
To count from 1 to 389,920,905 would take you about eighteen 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 389920905 cubic inches would be around 60.9 feet tall.
Recreational maths with 389920905
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