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40 is the smallest number with exactly nine solutions to the equation Euler's totient function (for values 41, 55, 75, 82, 88, 100, 110, 132, and 150 of ). Adding up some subsets of the divisors of 40 (e.g., 1, 4, 5, 10, and 20) gives 40; hence, 40 is the ninth semiperfect number. [ 7] 40 is also the ninth refactorable number.
Forty-four is a repdigit and palindromic number in decimal. It is the tenth 10- happy number, [ 1] and the fourth octahedral number. [ 2] It is a square-prime of the form p2 × q, and fourth of this form and of the form 2 2 × q, where q is a higher prime. It is the first member of the first cluster of two square-primes; of the form p2 × q ...
Tessarakonteres ( Greek: τεσσαρακοντήρης, "forty-rowed"), or simply " forty ", was a very large catamaran galley reportedly built in the Hellenistic period by Ptolemy IV Philopator of Egypt. It was described by a number of ancient sources, including a lost work by Callixenus of Rhodes and surviving texts by Athenaeus and Plutarch.
the sum of two squares (4 2 + 5 2 ), which makes it a centered square number. [ 4] the sum of the first three Mersenne primes, 3, 7, 31. [ 5] the sum of the sum of the divisors of the first 7 positive integers. the smallest integer whose reciprocal has a 5-digit repetend. That is a consequence of the fact that 41 is a factor of 99999.
47 is the ninth strictly non- palindromic number, following 19 and preceding 53. [ 7] 47 is the largest member of the simplest Cunningham chain, [ 8] where each prime member is one more than twice the previous. 47 is equivalently the fifth Thabit number of the form for positive , relating to the pair of amicable numbers {17296, 18416}.
Website. fortyandeight .org. La Société des 40 Hommes et 8 Chevaux (English: "The Society of 40 Men and 8 Horses" ), commonly known as the Forty and Eight, is a patriotic organization of U.S. veterans headquartered in Indianapolis, Indiana. It is made up of state, U.S. territory, and overseas grande, and these are in turn made up of locale.
Forty forty. Forty Forty (also known as 123 Home, Forty Forty In, Mob Mob, Mob and other names) is a children's game combining elements of the games "It" and Hide and seek. One player is "on", or "It", and they must capture the other players by 'spying' them rather than by tagging as there is no physical contact with another player.
UGM-96A Trident I C4. 41 for Freedom refers to the US Navy Fleet Ballistic Missile (FBM) submarines from the George Washington, Ethan Allen, Lafayette, James Madison, and Benjamin Franklin classes. All of these submarines were commissioned 1959–1967, as the goal was to create a credible, survivable sea-based deterrent as quickly as possible.