  The available data on the $D\overline{D}$ and inclusive hadronic cross
sections in the $\psi(3770)$ region from the BaBar, Belle, BES-II, CLEO and
KEDR experiments have been analyzed assuming that systematic uncertainties on
cross sections measured by different detectors are not correlated. Four
theoretical models predicting the $\psi(3770)$ line shape were considered for
the $D\overline{D}$ channel. All of them gave satisfactory description of the
data. The combined analysis of the $D\overline{D}$ and inclusive hadronic
channel was performed using the model based on the vector dominance approach
and accounting for the contribution of the $\psi(2S)$ tail to the
$D\overline{D}$ cross section. The following values of the mass, total width,
electron width and decay probability to the non-$D\overline{D}$ states were
obtained: $M=3779.8 \pm 0.6 ~\text{MeV}, \Gamma=25.8 \pm 1.3 ~\text{MeV} ,
\Gamma_{ee}=196 \pm 18 ~\text{eV}, \mathcal{B}_{nD\overline{D}}=0.164 \pm
0.049$, where the errors quoted include both statistical and dominant
systematic uncertainties.
