Source: Brahma Vaivarta Purana
रामनामांशतो जाता ब्रह्माण्डाः कोटि कोटिशः |
रामनाम्नि परे धाम्नि संस्थिताः स्वामिभिः सह ||
It is only from the Divine Name of Rama the creation of crores of Brahmandas has happened. Hence the crores of Brahmandas (entire cosmic) and all the deities are inherent in the Divine Name of Rama.
स्वभाविकी तथा ज्ञानक्रियाध्याः शक्तयः शुभाः |
रामनामांशतो जाताः सर्वलोकेषु पूजिताः ||
Hence the natural attributes of the Para Bhrama like Gnyana (omniscient), Bala (omnipotence), Aishwarya (Lordship), Shakthi (empowerment), Kriya (religious or clean act) are all present in the Divine Name of Rama and is worshipped at all times.
The general definition of the word Bhagavan is given as,
aisvaryasya samagrasya, viryasya yasasah sriyah
jnana-vairagyayos' caiva, sannam bhaga itingana
Bhagavan, the Supreme Lord, is thus defined as "He who is inseparably replete with the six inconceivable qualities of wealth, power, fame, beauty, knowledge and renunciation."
(Vishnu Purana 6.5.47)
Please check these: Excerpts from a discourse by our Sri Sri Muralidhara Swamiji