HTC 10 has a pixel density of:
564.85

A.K.A. HTC10
Released: 2016

Resolution: 2560×1440 5.2″ display

Quad HD (QHD) 2560×1440, 16:9 aspect ratio

Totaling 3.69mp (megapixels) and having a PPI of 564.85

Category: Phone
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HTC 10

Codename	Perfume
Manufacturer	HTC
Slogan	Power of 10
Model	10
Compatible networks	GSM, CDMA, 3G, EVDO, HSPA+, LTE, LTE Advanced
Predecessor	HTC One M9
Successor	HTC U Ultra HTC U11
Type	Smartphone
Form factor	Slate
Dimensions	145.9 mm (5.74 in) H 71.9 mm (2.83 in) W 9 mm (0.35 in) D
Mass	161 g (5.7 oz)
Operating system	Android 6.0.1 “Marshmallow” (release) Android 7.0 “Nougat” Android 8.0 “Oreo” (current)
System on chip	Qualcomm Snapdragon 820
GPU	Adreno 530
Memory	4 GB LPDDR4 RAM
Storage	32 or 64 GB
Removable storage	microSD up to 2 TB
Battery	3.8 V, 11.5 Wh (3,000 mAh) Li-Ion, non-replaceable[1]
Data inputs	List Accelerometer Gyroscope
Display	5.2 in (130 mm) Super LCD 5 with RGB matrix 2560 x 1440 pixels (564 ppi) Corning Gorilla Glass 4
Rear camera	Sony Exmor R IMX377 12.3 megapixels (4032×3024 px), Laser autofocus, dual-LED dual tone flash, f/1.8 aperture, 26 mm lens, optical image stabilization[2]
Front camera	5 MP, f/1.8 aperture , optical image stabilization
Connectivity	List Bluetooth 4.2 NFC USB 3.1 Gen 1 Type-C connector Wi-Fi (802.11 a/b/g/n/ac)
Website	www.htc.com/us/smartphones/htc-10/

This righthand infobox courtesy of Wikipedia.