991090100
991,090,100 is an even composite number composed of six prime numbers multiplied together.
991090100 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of one hundred forty-four divisors.
Prime factorization of 991090100:
22 × 52 × 7 × 11 × 13 × 9901
(2 × 2 × 5 × 5 × 7 × 11 × 13 × 9901)See below for interesting mathematical facts about the number 991090100 from the Numbermatics database.
Names of 991090100
- Cardinal: 991090100 can be written as Nine hundred ninety-one million, ninety thousand, one hundred.
Scientific notation
- Scientific notation: 9.910901 × 108
Factors of 991090100
Divisors of 991090100
- Number of divisors d(n): 144
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Complete list of divisors:
1 2 4 5 7 10 11 13 14 20 22 25 26 28 35 44 50 52 55 65 70 77 91 100 110 130 140 143 154 175 182 220 260 275 286 308 325 350 364 385 455 550 572 650 700 715 770 910 1001 1100 1300 1430 1540 1820 1925 2002 2275 2860 3575 3850 4004 4550 5005 7150 7700 9100 9901 10010 14300 19802 20020 25025 39604 49505 50050 69307 99010 100100 108911 128713 138614 198020 217822 247525 257426 277228 346535 435644 495050 514852 544555 643565 693070 762377 900991 990100 1089110 1287130 1386140 1415843 1524754 1732675 1801982 2178220 2574260 2722775 2831686 3049508 3217825 3465350 3603964 3811885 4504955 5445550 5663372 6435650 6930700 7079215 7623770 9009910 9910901 10891100 12871300 14158430 15247540 18019820 19059425 19821802 22524775 28316860 35396075 38118850 39643604 45049550 49554505 70792150 76237700 90099100 99109010 141584300 198218020 247772525 495545050 991090100
- Sum of all divisors σ(n): 2887898496
- Sum of proper divisors (its aliquot sum) s(n): 1896808396
- 991090100 is an abundant number, because the sum of its proper divisors (1896808396) is greater than itself. Its abundance is 905718296
Bases of 991090100
- Binary: 1110110001001011010101101101002
- Hexadecimal: 0x3B12D5B4
- Base-36: GE2I0K
Squares and roots of 991090100
- 991090100 squared (9910901002) is 982259586318010000
- 991090100 cubed (9910901003) is 973507751629875162701000000
-
The
square root of 991090100 is 31481.5835052813 -
The
cube root of 991090100 is 997.0211687083
Scales and comparisons
How big is 991090100?- 991,090,100 seconds is equal to 31 years, 26 weeks, 4 days, 22 hours, 48 minutes, 20 seconds.
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To count from 1 to 991,090,100 would take you about forty-seven 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 991090100 cubic inches would be around 83.1 feet tall.
Recreational maths with 991090100
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