31389930
31,389,930 is an even composite number composed of six prime numbers multiplied together.
31389930 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of one hundred sixty divisors.
Prime factorization of 31389930:
2 × 34 × 5 × 11 × 13 × 271
(2 × 3 × 3 × 3 × 3 × 5 × 11 × 13 × 271)See below for interesting mathematical facts about the number 31389930 from the Numbermatics database.
Names of 31389930
- Cardinal: 31389930 can be written as Thirty-one million, three hundred eighty-nine thousand, nine hundred thirty.
Scientific notation
- Scientific notation: 3.138993 × 107
Factors of 31389930
Divisors of 31389930
- Number of divisors d(n): 160
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Complete list of divisors:
1 2 3 5 6 9 10 11 13 15 18 22 26 27 30 33 39 45 54 55 65 66 78 81 90 99 110 117 130 135 143 162 165 195 198 234 270 271 286 297 330 351 390 405 429 495 542 585 594 702 715 810 813 858 891 990 1053 1170 1287 1355 1430 1485 1626 1755 1782 2106 2145 2439 2574 2710 2970 2981 3510 3523 3861 4065 4290 4455 4878 5265 5962 6435 7046 7317 7722 8130 8910 8943 10530 10569 11583 12195 12870 14634 14905 17615 17886 19305 21138 21951 23166 24390 26829 29810 31707 35230 36585 38610 38753 43902 44715 52845 53658 57915 63414 73170 77506 80487 89430 95121 105690 109755 115830 116259 134145 158535 160974 190242 193765 219510 232518 241461 268290 285363 317070 348777 387530 402435 475605 482922 570726 581295 697554 804870 951210 1046331 1162590 1207305 1426815 1743885 2092662 2414610 2853630 3138993 3487770 5231655 6277986 10463310 15694965 31389930
- Sum of all divisors σ(n): 99525888
- Sum of proper divisors (its aliquot sum) s(n): 68135958
- 31389930 is an abundant number, because the sum of its proper divisors (68135958) is greater than itself. Its abundance is 36746028
Bases of 31389930
- Binary: 11101111011111000111010102
- Hexadecimal: 0x1DEF8EA
- Base-36: IOSMI
Squares and roots of 31389930
- 31389930 squared (313899302) is 985327705404900
- 31389930 cubed (313899303) is 30929367699720432657000
-
The
square root of 31389930 is 5602.6716841165 -
The
cube root of 31389930 is 315.4496978365
Scales and comparisons
How big is 31389930?- 31,389,930 seconds is equal to 51 weeks, 6 days, 7 hours, 25 minutes, 30 seconds.
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To count from 1 to 31,389,930 would take you about twenty-five 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 31389930 cubic inches would be around 26.3 feet tall.
Recreational maths with 31389930
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