" 
 == Organization comparison == 

 {| class=""wikitable"" 
 |- 
 ! style=""width:5%;"" | 
 ! style=""width:50%;"" |  
 ! style=""width:50%;"" |  
 |- 
 | Population 
 | 360,029,936 
 | 387,948,000  
 |- 
 | Area 
 | 13,953,041 km²  (5,382,910 sq mi) 
 | 17,731,457 km² (6,846,154 sq mi ) 
 |- 
 | Population Density 
 | 24.33/km² (63 /sq mi) 
 | 21.9/km2 (56.7/sq mi) 
 |- 
 | Headquarters 
 | Cairo 
 | proposed (Secretariat Headquarters) Quito and (Parliament seat) Cochabamba 
 |- 
 | Largest City 
 | Cairo - 6,758,581 (17,856,000 Metro) 
 | São Paulo  - 11,037,593 (19,889,559 Metro) 
 |- 
 | Organization Type 
 | regional organisation and Political union 
 | regional organisation and Political union 
 |- 
 | Official languages 
 | Arabic language 
 | Portuguese, Spanish, Dutch and English 
 |- 
 | Main Religions 
 | 91% Islam (5.8% Christianity), 4% Others, 
 | Majority Christianity. 
 |- 
 | GDP (nominal) 
 | $1.898 trillion ($7,672 per capita) 
 | $2.879 trillion (7,421 per capita) 
 |} 
   "