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
The whole world is watching hotel. The prescient and apparently spontaneous chant quickly became famous. The following year, it served as the title of a television movie about student activism. On track 10 of their 1969 hit debut record album the rock band Chicago, then known as CTA (Chicago Transit Authority), used what may be a copy of the real audio clip of the crowd chanting, "The whole world is watching." The track called, "Prologue, August 29, 1968" is 57 seconds long. The chant continues into the next song, track eleven, "Someday (August 29, 1968)" but fades away after a few seconds, only to return