Number
840,000
- Positive
- Even
- Composite
- 6 digits
840,000 is an even 6-digit integer and a composite number. It has 140 divisors and a digital root of 3.
Number properties
ParityEvendivisible by 2
SignPositive
PrimalityComposite
Absolute value840,000
Digit count6
Digit sum12
Digital root3repeated digit sum
PalindromicNoreads differently backwards
Happy numberNosquared-digit sums reach 1
Harshad numberYesdivisible by its own digit sum
Factors & divisors
Prime factorisation2^6 × 3 × 5^4 × 7
Distinct prime factors42, 3, 5, 7
Number of divisors140
Sum of divisors σ(n)3,173,984
Aliquot sum2,333,984sum of the proper divisors
ClassificationAbundantthe aliquot sum exceeds the number
Euler's totient φ(n)192,000integers below n that share no factor with it
SquarefreeNohas a repeated prime factor
All divisors1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 25, 28, 30, 32, 35, 40, 42, 48, 50, 56, 60, 64, 70, 75, 80, 84, 96, 100, 105, 112, 120, 125, 140, 150, 160, 168, 175, 192, 200, 210, 224, 240, 250, 280, 300, 320, 336, 350, 375, 400, 420, 448, 480, 500, 525, 560, 600, 625, 672, 700, 750, 800, 840, 875, 960, 1,000, 1,050, 1,120, 1,200, 1,250, 1,344, 1,400, 1,500, 1,600, 1,680, 1,750, 1,875, 2,000, 2,100, 2,240, 2,400, 2,500, 2,625, 2,800, 3,000, 3,360, 3,500, 3,750, 4,000, 4,200, 4,375, 4,800, 5,000, 5,250, 5,600, 6,000, 6,720, 7,000, 7,500, 8,000, 8,400, 8,750, 10,000, 10,500, 11,200, 12,000, 13,125, 14,000, 15,000, 16,800, 17,500, 20,000, 21,000, 24,000, 26,250, 28,000, 30,000, 33,600, 35,000, 40,000, 42,000, 52,500, 56,000, 60,000, 70,000, 84,000, 105,000, 120,000, 140,000, 168,000, 210,000, 280,000, 420,000, 840,000140 in total
Arithmetic
Representations
Decimal840,000
Binary1100110100010100000020 bits
Octal3150500
HexadecimalCD140
Base 36I05C
Roman numeralNot defined above 3,999there is no agreed standard notation
In wordseight hundred and forty thousand
Ordinaleight hundred and forty thousandth
Scientific notation8.4 × 10^5
Engineering notation840 × 10^3
Nearest landmarks
Powers & multiples
840,000 to the power 2705,600,000,000
840,000 to the power 3592,704,000,000,000,000
840,000 to the power 4497,871,360,000,000,000,000,000
840,000 to the power 5418,211,942,400,000,000,000,000,000,000
First ten multiples840,000, 1,680,000, 2,520,000, 3,360,000, 4,200,000, 5,040,000, 5,880,000, 6,720,000, 7,560,000, 8,400,000
Powers of twoBetween 2^19 (524,288) and 2^20 (1,048,576)
Divisibility tests
Divisible by 2Yes
Divisible by 3Yes
Divisible by 4Yes
Divisible by 5Yes
Divisible by 6Yes
Divisible by 7Yes
Divisible by 8Yes
Divisible by 9No, remainder 3
Divisible by 10Yes
Divisible by 11No, remainder 7
Divisible by 12Yes
Divisible by 100Yes
Collatz (3n + 1) trajectory
Steps to reach 182the total stopping time
Highest value reached840,000
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps840,000 → 420,000 → 210,000 → 105,000 → 52,500 → 26,250 → 13,125 → 39,376 → 19,688 → 9,844 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage84,000,000%
840,000% as a decimal8,400
840,000% of 100840,000
840,000% of 1,0008,400,000
As a fraction of 100840,000/100
Read another way
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Derived from 840,000
Also reads as
#840000 (colour)
- #840000
- Red
- Dark
- Nearest: Maroon
#840000 is a red with RGB values 132, 0, 0 and HSL 0°, 100%, 26%. It is a dark colour, so white text on it reaches 10.6:1 contrast (AAA for normal text). The nearest named colour is Maroon.
Colour values
#840000#840000
HEX#840000
RGBrgb(132, 0, 0)
RGB (0–1)0.5176, 0, 0
RGB percentages51.8%, 0%, 0%
HSLhsl(0, 100%, 25.9%)
HSV / HSBhsv(0, 100%, 51.8%)
CMYK0%, 100%, 100%, 48.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer8,650,752
CSS custom property--colour: #840000;
Brightness & contrast
Relative luminance0.04906WCAG 2.x, 0 is black and 1 is white
Perceived brightness72.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.6:1
Contrast with white10.6:1WCAG normal text: AAA
Contrast with black1.98:1WCAG normal text: Fail
Greyscale equivalent#1C1C1C
Inverted#7BFFFF
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text10.6:1WCAG large text: AAA
Contrast with black, large text1.98:1WCAG large text: Fail
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#008484
Analogous#840042, #844200
Triadic#008400, #000084
Split complementary#008442, #004284
Tetradic#428400, #008484, #420084
Tints, shades & saturation
Channel breakdown
R132
G0
B0
Red132 (51.8%)
Green0 (0%)
Blue0 (0%)
Hue0°
Saturation (HSL)100%
Lightness25.88%
Dominant channelRed
Hex per channelR 84 · G 00 · B 00
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