504

504 is a natural number that follows 503 and precedes 505. It factors into 2^3 × 3^2 × 7, giving it 24 divisors. In base-10 arithmetic, 504 is a Harshad number because it is divisible by the sum of its digits (5 + 0 + 4 = 9; 504 ÷ 9 = 56).

In computing, the HTTP status code 504 denotes a gateway timeout. This means a server that functions as a gateway or proxy did not receive a timely response from an upstream server, causing the client’s request to fail or stall.

The area code 504 serves the New Orleans metropolitan area in Louisiana, United States. It is associated with telephone services and regional telecommunications infrastructure.

In United States education law, Section 504 of the Rehabilitation Act of 1973 prohibits discrimination on the basis of disability in programs receiving federal funding. A 504 Plan provides accommodations to eligible students within schools to ensure equal access to education.

In calendar usage, 504 CE (AD 504) is a year in the 6th century CE, while 504 BCE is a year in the 5th century BCE. The number is used in historical dating for events that occurred in these periods.