Please answer the given financial question based on the context.
Context: equity compensation plan information the following table presents the equity securities available for issuance under our equity compensation plans as of december 31 , 2017 . equity compensation plan information plan category number of securities to be issued upon exercise of outstanding options , warrants and rights ( 1 ) weighted-average exercise price of outstanding options , warrants and rights number of securities remaining available for future issuance under equity compensation plans ( excluding securities reflected in column ( a ) ) ( a ) ( b ) ( c ) equity compensation plans approved by security holders 448859 $ 0.00 4087587 equity compensation plans not approved by security holders ( 2 ) 2014 2014 2014 .
|plan category|number of securities to be issued upon exercise of outstanding options warrants and rights ( 1 ) ( a ) ( b )|weighted-average exercise price of outstanding optionswarrants and rights|number of securities remaining available for future issuance under equity compensation plans ( excluding securitiesreflected in column ( a ) ) ( c )|
|equity compensation plans approved by security holders|448859|$ 0.00|4087587|
|equity compensation plans not approved by security holders ( 2 )|2014|2014|2014|
|total|448859|$ 0.00|4087587|
( 1 ) includes grants made under the huntington ingalls industries , inc . 2012 long-term incentive stock plan ( the "2012 plan" ) , which was approved by our stockholders on may 2 , 2012 , and the huntington ingalls industries , inc . 2011 long-term incentive stock plan ( the "2011 plan" ) , which was approved by the sole stockholder of hii prior to its spin-off from northrop grumman corporation . of these shares , 27123 were stock rights granted under the 2011 plan . in addition , this number includes 28763 stock rights , 3075 restricted stock rights , and 389898 restricted performance stock rights granted under the 2012 plan , assuming target performance achievement . ( 2 ) there are no awards made under plans not approved by security holders . item 13 . certain relationships and related transactions , and director independence information as to certain relationships and related transactions and director independence will be incorporated herein by reference to the proxy statement for our 2018 annual meeting of stockholders , to be filed within 120 days after the end of the company 2019s fiscal year . item 14 . principal accountant fees and services information as to principal accountant fees and services will be incorporated herein by reference to the proxy statement for our 2018 annual meeting of stockholders , to be filed within 120 days after the end of the company 2019s fiscal year. .
Question: what is the combined number of equity compensation plans approved by security holders


Answer: The answer is:4536446.0