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Number

1,600

  • Positive
  • Even
  • Composite
  • Perfect square
  • 4 digits

1,600 is an even 4-digit integer and a composite number. It has 21 divisors and a digital root of 7.

Number properties

ParityEvendivisible by 2
SignPositive
PrimalityComposite
Absolute value1,600
Digit count4
Digit sum7
Digital root7repeated digit sum
PalindromicNoreads differently backwards
Perfect squareYes, 40²
Happy numberNosquared-digit sums reach 1
Harshad numberNodivisible by its own digit sum

Factors & divisors

Prime factorisation2^6 × 5^2
Distinct prime factors22, 5
Number of divisors21
Sum of divisors σ(n)3,937
Aliquot sum2,337sum of the proper divisors
ClassificationAbundantthe aliquot sum exceeds the number
Euler's totient φ(n)640integers below n that share no factor with it
SquarefreeNohas a repeated prime factor
All divisors1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 160, 200, 320, 400, 800, 1,60021 in total

Arithmetic

Previous number1,599
Next number1,601
Double3,200
Half800
Square2,560,000
Cube4,096,000,000
Square root40exact
Cube root11.696070953≈
Negation-1,600
Reciprocal0.000625≈

Representations

Decimal1,600
Binary1100100000011 bits
Octal3100
Hexadecimal640
Base 3618G
Roman numeralMDC
In wordsone thousand, six hundred
Ordinalone thousand, six hundredth
Scientific notation1.6 × 10^3
Engineering notation1.6 × 10^3

Nearest landmarks

Next prime1,601+1
Previous prime1,597−3
Distance to nearest prime1
Nearest square below1,600
Nearest square above1,681

Powers & multiples

1,600 to the power 22,560,000
1,600 to the power 34,096,000,000
1,600 to the power 46,553,600,000,000
1,600 to the power 510,485,760,000,000,000
First ten multiples1,600, 3,200, 4,800, 6,400, 8,000, 9,600, 11,200, 12,800, 14,400, 16,000
Powers of twoBetween 2^10 (1,024) and 2^11 (2,048)

Divisibility tests

Divisible by 2Yes
Divisible by 3No, remainder 1
Divisible by 4Yes
Divisible by 5Yes
Divisible by 6No, remainder 4
Divisible by 7No, remainder 4
Divisible by 8Yes
Divisible by 9No, remainder 7
Divisible by 10Yes
Divisible by 11No, remainder 5
Divisible by 12No, remainder 4
Divisible by 100Yes

Collatz (3n + 1) trajectory

Steps to reach 129the total stopping time
Highest value reached1,600
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps1,600 → 800 → 400 → 200 → 100 → 50 → 25 → 76 → 38 → 19 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1

As a percentage & fraction

As a percentage160,000%
1,600% as a decimal16
1,600% of 1001,600
1,600% of 1,00016,000
As a fraction of 1001,600/100

Read another way

As seconds26 minutes and 40 seconds
As bytes1.563 KiB
As a year1600 AD
As a 24-bit colour#000640

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Neighbouring numbers

Nearby primes

Also reads as

1600 (year)

  • Leap year
  • 366 days
  • 16th century
  • Rat

1600 was a leap year of 366 days. It began on a Saturday and ended on a Sunday. Easter Sunday fell on 2 April.

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Structure of the year

Leap yearYesdivisible by 4, and by 400 if divisible by 100
Days in the year366
Weeks in the year52ISO 8601 weeks; 28 December is always in the final week
Days in February29
1 January fell on aSaturday
31 December fell on aSunday
Century16th century
Decade1600s
Chinese zodiacRat
Easter Sunday2 April

Months of 1600

January31 days, starts Saturday
February29 days, starts Tuesday
March31 days, starts Wednesday
April30 days, starts Saturday
May31 days, starts Monday
June30 days, starts Thursday
July31 days, starts Saturday
August31 days, starts Tuesday
September30 days, starts Friday
October31 days, starts Sunday
November30 days, starts Wednesday
December31 days, starts Friday

Time references

These values depend on today’s date and change daily.

Unix timestamp at the start-11,676,096,000
Unix timestamp at the end-11,644,473,601
Years from now426 years ago
Days from today155,845 days since 1 January

The number 1600

As a number1,600
In wordsone thousand, six hundred
Roman numeralsMDC

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Neighbouring years

Also reads as

#116600 (colour)

  • #116600
  • Green
  • Dark
  • Nearest: Dark green

#116600 is a green with RGB values 17, 102, 0 and HSL 110°, 100%, 20%. It is a dark colour, so white text on it reaches 7.2:1 contrast (AAA for normal text). The nearest named colour is Dark green.

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Colour values

#116600#116600
HEX#116600
HEX (short)#160
RGBrgb(17, 102, 0)
RGB (0–1)0.0667, 0.4, 0
RGB percentages6.7%, 40%, 0%
HSLhsl(110, 100%, 20%)
HSV / HSBhsv(110, 100%, 40%)
CMYK83.3%, 0%, 100%, 60%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,140,224
CSS custom property--colour: #116600;

Brightness & contrast

Relative luminance0.09622WCAG 2.x, 0 is black and 1 is white
Perceived brightness78.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.18:1
Contrast with white7.18:1WCAG normal text: AAA
Contrast with black2.92:1WCAG normal text: Fail
Greyscale equivalent#4D4D4D
Inverted#EE99FF

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#695B00no red cones; affects about 1% of men; ΔE 39 from the original
Deuteranopia#605511no green cones; the most common form, about 1% of men; ΔE 38.7 from the original
Tritanopia#006255no blue cones; rare, and affects men and women equally; ΔE 44.5 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text7.18:1WCAG large text: AAA
Contrast with black, large text2.92:1WCAG large text: Fail

Named colours

Dark green · ΔE 1.9Green · ΔE 15.1Forest green · ΔE 15.6Olivedrab · ΔE 23.3Dark olivegreen · ΔE 26.6Sea green · ΔE 26.9
Nearest named CSS colourDark green (#006400)ΔE 1.88, below the just-noticeable difference
Hue familygreen
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#550066
Analogous#446600, #006622
Triadic#001166, #660011
Split complementary#220066, #660044
Tetradic#004466, #550066, #662200

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#55FF33
Lighter +30%#2BFF00
Lighter +20%#22CC00
Lighter +10%#1A9900
Darker −10%#093300
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#116600
Less saturated −25%#1A590D

Channel breakdown

R17
G102
B0
Red17 (6.7%)
Green102 (40%)
Blue0 (0%)
Hue110°
Saturation (HSL)100%
Lightness20%
Dominant channelGreen
Hex per channelR 11 · G 66 · B 00

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Every value on this page was computed from “1600” by Nerdulator’s number engine. Nothing here was retrieved from a database of answers or written by a model.