LG G6 has a pixel density of:
564.90

A.K.A.
Released: 2017

Resolution: 2880×1440 5.7″ display

Totaling 4.15mp (megapixels) and having a PPI of 564.90

Category: Phone
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LG G6
LG G6+

Brand	G series
Manufacturer	LG Electronics
Slogan	The Big Screen That Fits In Your Hand[1]
First released	February 26, 2017; 2 years ago (2017-02-26)
Predecessor	LG G5
Successor	LG G7 ThinQ
Related	LG V30, LG Q6, LG Q7
Type	Smartphone
Form factor	Slate
Dimensions	148.9 x 71.9 x 7.9 mm (5.86 x 2.83 x 0.31 in)
Mass	162 g (5.7 oz)
Operating system	Original: Android 7.0 “Nougat” (now 8.0 “Oreo”)
System on chip	Qualcomm Snapdragon 821
CPU	Quad-core (2×2.35 GHz & 2×1.6 GHz) Kryo
GPU	Adreno 530
Memory	G6: 4 GB LPDDR4 RAM G6+: 4 GB LPDDR4 RAM[2]
Storage	G6: 32 or 64 GB G6+: 128 GB
Removable storage	microSDXC
Battery	3300 mAh Li-Po, non removable
Data inputs	Fingerprint (rear-mounted), accelerometer, gyro, proximity, compass, barometer, color spectrum
Display	5.7 in (145 mm) 2880×1440 1440p IPS LCD
Rear camera	13 MP (f/1.8, OIS, 3-axis) + 13 MP (f/2.4), active autofocus, LED flash 2160p@30fps, 1080p@30fps, HDR, stereo sound rec.
Front camera	5 MP, f/2.2, 1080p
Sound	Mono speaker, 3.5 mm stereo audio jack
Connectivity	Type-C 1.0 reversible connector + 802.11 a/b/g/n/ac Wi-fi, dual-band + Bluetooth 4.2 + NFC + Radio + GPS
Website	www.lg.com/us/mobile-phones/g6/

This righthand infobox courtesy of Wikipedia.