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use DrupalnodeEntityNode;

function abc($v) 
 $node = DrupalnodeEntityNode::load($v);
 print_r($node);

The array structure of $node is as given below

DrupalnodeEntityNode Object (
[in_preview] => 

[values:protected] => Array
 (


 [nid] => Array
 (
 [x-default] => 166
 )

 [vid] => Array
 (
 [x-default] => 180
 )

 [type] => Array
 (
 [x-default] => sections
 )

 [uuid] => Array
 (
 [x-default] => 7759efc9-cfff-4d58-b392-8d60b9903323
 )

 [langcode] => Array
 (
 [x-default] => en
 )

As mentioned in the comment of @Hudri Node is an object not an array.

In Drupal 8 there are two ways to get the value of a field.

1. 
   $node->field_name->value


2. $node->get("field_name")->getValue()

In your case you can get the nid and title like below:

$nid = $node->id();
$title = $node->label();

or

$title = $node->getTitle();

To read about objected-oriented programming conventions In Drupal 8 check this blog article: Drupal 8 API: objected-oriented programming conventions.

you can get the node id like this :

$nid = $node->id();

and for the title :

$title = $node->label();

You can get the node id and node title values by using Node::load function.

use DrupalnodeEntityNode;

function abc($v)

$node = Node::load($v);

$strNodeId = $node->nid->value;

$strNodeTitle = $node->title->value;

echo 'Id: '.$strNodeId;

echo 'Title: '.$strNodeTitle;
exit();