Depends on the configuration.
Seat Guru
This one has
307 seats:
First Class:
14 Flat bed sleeping pods
Business Class:
66 Lie-flat Skybeds with no floor storage
Premium Economy Class:
40 seats with 9 inch recline and fixed armrests
Economy Class:
187 seats with 6 inch recline
The two class version has
412 seats:
Business Class:
56 Lie-flat Skybeds More Info
Economy Class:
356 seats with adjustable headrests and lumbar