how to find apple id by number
I do not remember my apple account if it is possible to indicate the username which is in my personal number +38345991748
See if you can recover the ID/password. Use every email address you can think of.
Apple ID - How to find your Apple - An iCloud e-mail address is an Apple ID.
If you forgot the Apple ID (iCloud) password, enter the Apple (iCloud) ID, and click Forgot Password. See if you can get a Rescue or Notification email option if necessary. Link to contact Apple Support at the end of the 2nd article.