400 (number) third perfect number, a number whose divisors add up to the actual number (1+2+4+8+16+31+62+124+248=496). 497 = 7 × 71, sum of five consecutive primes (89 + 97 + 101 + 103 + 107) 498 = 2 × 3 × 83, sphenic number, untouchable number, admirable number, abundant number A prime number, Chen prime 400 (number) 400 (four hundred) is the natural number following 399 and preceding 401. 400 is the square of 20. 400 is the sum of the powers of 7 from 0 to 3, thus making it a repdigit in base 7 (1111). A circle is divided into
What to the Slave Is the Fourth of July? Fourth Oration but was actually delivered on July 5, some confusion has arisen about the date and contents of the speech. The speech has since been published under the above title in "The Frederick Douglass Papers", Series One, Vol. 2. While referring to the celebrations of the American Independence day the day before, the speech explores the constitutional and values-based arguments against the Slave trade within the United States. Douglass suggests that positive statements about American values, such as liberty, citizenship, and freedom, were an offense to the enslaved people of the United States because of their lack of freedom,