Finite Group DatabasebetaFinite Group Databasebeta| order | 640 |
| automorphism | ? |
| homology | Abelianization (H1) = C23×C4 · Schur multiplier (H2) = C24 |
No aliases for this group.
| Fitting | C5×#446 ⋊ C2 |
| Sylow | C5 ⋊ Q8×M16 |
| subgroup | G/H | |
|---|---|---|
| center, Frattini | C2×C4 | C23×D5 |
| commutator, socle | C22×C5 | C23×C4 |
| Fitting | C5×#446 | C2 |
| prime radical | C22×D5 | C22×C4 |
| cosocle | C2×C4×C5 | C24 |
| hypercenter | #446 | D5 |
| hypocenter | C5 | Q8×M16 |
| LCS | G ▷ C22×C5 ▷ C5 | |
| UCS | C1 ◁ C2×C4 ◁ #446 | |
388 conjugacy classes of subgroups.
| transitive degree | μt(G) = 320 |
Polycyclic presentation:
2^7,5|a^2=f,b^2=e,c^2=ef,f^2=g,b^a=be,d^a=dg,h^a=h^4,d^c=dg,h^d=h^4106 conjugacy classes — view the full character table.
| maximal subgroup of | #12070221, #12070227, #12070232, … |
| maximal normal subgroup of | #12070221, #12070227, #12070232, … |
| maximal quotient of | #12097290, #12097292, #12097948, … |
Construct this group in GAP via the SmallGroups library:
gap> SmallGroup(640, 13775);