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
Joe Root Root signed a three-year professional contract with Yorkshire. Root was selected for the Under 19 Cricket World Cup, in New Zealand, making an unbeaten 70 in a victory against Hong Kong as England progressed to the quarter finals before being eliminated by the West Indies. Later that winter, he was sent to the Darren Lehmann Academy in Adelaide, South Australia, to fine tune his game. In the fourth Test against India, Root became the 655th player to represent England at Test cricket, receiving his cap from former England all-rounder Paul Collingwood. Coming in as the number 6 batsman rather than