Order 360.
36 conjugacy classes of subgroups.
| # | subgroup | G/H | class size | multiplicity | normal? | properties |
|---|---|---|---|---|---|---|
| 1 | Dic45 | C2 | 1 | 1 | yes | maximal, characteristic |
| 2 | C9×Dic5 | C2 | 1 | 1 | yes | maximal, characteristic |
| 3 | C5×Dic9 | C2 | 1 | 1 | yes | maximal, characteristic |
| 4 | #1204 | — | 3 | 1 | no | maximal |
| 5 | C2×C5×C9 | C22 | 1 | 1 | yes | characteristic |
| 6 | Dic18 | — | 5 | 1 | no | maximal, Hall |
| 7 | Dic15 | — | 3 | 1 | no | — |
| 8 | C3×Dic5 | D3 | 1 | 1 | yes | characteristic |
| 9 | C5×Dic3 | — | 3 | 1 | no | — |
| 10 | C5×C9 | Q8 | 1 | 1 | yes | characteristic, complemented, Hall |
| 11 | Dic10 | — | 9 | 1 | no | Hall |
| 12 | C4×C9 | — | 5 | 1 | no | — |
| 13 | Dic9 | — | 5 | 1 | no | — |
| 14 | Dic9 | D5 | 1 | 1 | yes | characteristic |
| 15 | C2×C3×C5 | C2×D3 | 1 | 1 | yes | characteristic |
| 16 | Dic6 | — | 15 | 1 | no | — |
| 17 | C4×C5 | — | 9 | 1 | no | — |
| 18 | Dic5 | — | 9 | 1 | no | — |
| 19 | Dic5 | D9 | 1 | 1 | yes | characteristic |
| 20 | C2×C9 | C2×D5 | 1 | 1 | yes | characteristic |
| 21 | C3×C5 | Dic6 | 1 | 1 | yes | characteristic |
| 22 | C3×C4 | — | 5 | 1 | no | — |
| 23 | Dic3 | — | 3 | 1 | no | — |
| 24 | Dic3 | — | 15 | 1 | no | — |
| 25 | C2×C5 | C2×D9 | 1 | 1 | yes | characteristic |
| 26 | C9 | Dic10 | 1 | 1 | yes | characteristic, complemented, Sylow |
| 27 | Q8 | — | 45 | 1 | no | Sylow |
| 28 | C2×C3 | D3×D5 | 1 | 1 | yes | characteristic |
| 29 | C5 | Dic18 | 1 | 1 | yes | characteristic, complemented, Sylow |
| 30 | C4 | — | 5 | 1 | no | — |
| 31 | C4 | — | 9 | 1 | no | — |
| 32 | C4 | — | 45 | 1 | no | — |
| 33 | C3 | #1204 | 1 | 1 | yes | characteristic |
| 34 | C2 | D5×D9 | 1 | 1 | yes | characteristic |
| subgroup | G/H | |
|---|---|---|
| center, hypercenter | C2 | D5×D9 |
| commutator, Fitting, cosocle | C2×C5×C9 | C22 |
| Frattini | C2×C3 | D3×D5 |
| socle, prime radical | C2×C3×C5 | C2×D3 |
| hypocenter | C5×C9 | Q8 |
| LCS | G ▷ C2×C5×C9 ▷ C5×C9 | |
| UCS | C1 ◁ C2 | |
Splittings G = N ⋊ H with N normal; H ≅ G/N.
| N | H ≅ G/N | type |
|---|---|---|
| 10. C5×C9 | Q8 | semidirect |
| 26. C9 | Dic10 | semidirect |
| 29. C5 | Dic18 | semidirect |
By isomorphism type — maximal subgroups of the same type appear once, whether or not they are normal.
| subgroup | index |
|---|---|
| Dic45 | 2 |
| C9×Dic5 | 2 |
| C5×Dic9 | 2 |
| #1204 | 3 |
| Dic18 | 5 |