Order 720.
66 conjugacy classes of subgroups.
Splittings G = N ⋊ H with N normal; H ≅ G/N.
| N | H ≅ G/N | type |
|---|---|---|
| 1. C9×D20 | C2 | semidirect |
| 2. C5×C8×C9 | C2 | semidirect |
| 11. D40 | C9 | direct (N × H) |
| 13. C8×C9 | D5 | semidirect |
| 17. C5×C9 | D8 | semidirect |
| 18. D20 | C2×C9 | semidirect |
| 19. C5×C8 | C2×C9 | semidirect |
| 36. C9 | D40 | direct (N × H) |
| 38. C8 | C9×D5 | semidirect |
| 41. C5 | C9×D8 | semidirect |
By isomorphism type — maximal subgroups of the same type appear once, whether or not they are normal.
| subgroup | index |
|---|---|
| C9×D20 | 2 |
| C5×C8×C9 | 2 |
| C3×D40 | 3 |
| C9×D8 | 5 |