Recognised as Decimal number
1.3 × 10^40
- Positive
- Decimal
- 0 d.p.
- Exact fraction
- 3 s.f.
1.3 × 10^40 is a decimal number equal to 13,000,000,000,000,000,274,029,254,993,641,849,487,360⁄1. It lies between 13,000,000,000,000,000,274,029,254,993,641,849,487,360 and 13,000,000,000,000,000,274,029,254,993,641,849,487,360, and as a percentage it is 1.3 × 10^42%.
Number properties
Absolute value1.3 × 10^40
SignPositive
Integer part13,000,000,000,000,000,274,029,254,993,641,849,487,360
Fractional part0
Decimal places0
Rounded to nearest13,000,000,000,000,000,274,029,254,993,641,849,487,360
Fractions & ratios
Ratio13,000,000,000,000,000,274,029,254,993,641,849,487,360 : 1
As a percentage1.3 × 10^42%
Reciprocal7.69230769 × 10^-41≈
Arithmetic
Double2.6 × 10^40
Half6.5 × 10^39
Square1.69 × 10^80
Cube2.197 × 10^120
Square root1.14017543 × 10^20≈
Cube root23,513,346,877,207.6≈
Negation-1.3 × 10^40
Natural logarithm92.3657679842≈
Logarithm base 1040.1139433523≈
Representations
Decimal1.3 × 10^40
Scientific notation1.3 × 10^40
Exponential1.3e+40
IEEE 754 binary64 (hex)0x48431A0E76BEFC38the exact 64-bit pattern stored
IEEE 754 binary32 (hex)0x7F80000032-bit single precision, may lose accuracy
Rounding & precision
Significant figures as written3counted from the digits as typed, not from the value
To 0 decimal places1.3e+40
To 1 decimal place1.3e+40
To 2 decimal places1.3e+40
To 3 decimal places1.3e+40
To 4 decimal places1.3e+40
To 1 significant figure1e+40
To 2 significant figures1.3e+40
To 3 significant figures1.3e+40
To 4 significant figures1.3e+40
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Also reads as
#130E38 (colour)
- #130E38
- Blue
- Dark
- Nearest: Midnight blue
#130E38 is a blue with RGB values 19, 14, 56 and HSL 247°, 60%, 14%. It is a dark colour, so white text on it reaches 18.3:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.
Colour values
#130E38#130E38
HEX#130E38
RGBrgb(19, 14, 56)
RGB (0–1)0.0745, 0.0549, 0.2196
RGB percentages7.5%, 5.5%, 22%
HSLhsl(247.1, 60%, 13.7%)
HSV / HSBhsv(247.1, 75%, 22%)
CMYK66.1%, 75%, 0%, 78%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,248,824
CSS custom property--colour: #130E38;
Brightness & contrast
Relative luminance0.00738WCAG 2.x, 0 is black and 1 is white
Perceived brightness24.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 18.3:1
Contrast with white18.3:1WCAG normal text: AAA
Contrast with black1.15:1WCAG normal text: Fail
Greyscale equivalent#121212
Inverted#ECF1C7
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text18.3:1WCAG large text: AAA
Contrast with black, large text1.15:1WCAG large text: Fail
Named colours
Hue familyblue
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#33380E
Analogous#0E1E38, #280E38
Triadic#38130E, #0E3813
Split complementary#38280E, #1E380E
Tetradic#380E1E, #33380E, #0E3828
Tints, shades & saturation
Channel breakdown
R19
G14
B56
Red19 (7.5%)
Green14 (5.5%)
Blue56 (22%)
Hue247.14°
Saturation (HSL)60%
Lightness13.73%
Dominant channelBlue
Hex per channelR 13 · G 0E · B 38
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Harmonies
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