Finite Group DatabasebetaFinite Group Databasebeta| order | 640 |
| automorphism | ? |
| homology | Abelianization (H1) = C24 · Schur multiplier (H2) = C26 |
No aliases for this group.
| Fitting | C2×C4×C5×D4 ⋊ C2 |
| Sylow | C5 ⋊ #2388 |
| subgroup | G/H | |
|---|---|---|
| center | C22×C4 | C22×D5 |
| commutator, socle, cosocle | C23×C5 | C24 |
| Frattini | C23 | C23×D5 |
| Fitting | C2×C4×C5×D4 | C2 |
| hypercenter | C2×C4×D4 | D5 |
| hypocenter | C5 | #2388 |
| LCS | G ▷ C23×C5 ▷ C5 | |
| UCS | C1 ◁ C22×C4 ◁ C2×C4×D4 | |
944 conjugacy classes of subgroups.
| transitive degree | μt(G) = 320 |
Polycyclic presentation:
2^7,5|d^2=e,b^a=be,c^a=cf,h^a=h^4,c^b=cg124 conjugacy classes — view the full character table.
| maximal subgroup of | #11994267, #11994269, #11994272, … |
| maximal normal subgroup of | #11994267, #11994269, #11994272, … |
| maximal quotient of | #12020978, #12020982, #12021011, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(640, 16213);