457 may refer to:
- The year AD 457 in the Western calendar
- The number 457
- The 457 plan, a retirement plan available to government and nonprofit employees in the United States similar to the 401(k)
- The 457 visa, the most commonly used program for employers to sponsor overseas workers to work in Australia on a temporary basis.
- The Smith & Wesson Model 457, a pistol.
Year 457 (CDLVII) was a common year starting on Tuesday of the Julian calendar. At the time, it was known as the Year of the Consulship of Constantinus and Rufus. The denomination 457 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
The 457 plan is a type of non-qualified, tax advantaged deferred-compensation retirement plan that is available for governmental and certain non-governmental employers in the United States. The employer provides the plan and the employee defers compensation into it on a pre-tax or after-tax (Roth) basis. For the most part the plan operates similarly to a 401(k) or 403(b) plan most people are familiar with in the US. The key difference is that unlike with a 401(k) plan, there is no 10% penalty for withdrawal before the age of 55. 457 plans can also allow independent contractors to participate in the plan where 401(k) and 403(b) plans cannot.
The United States of America (USA), commonly known as the United States or America, is a country composed of 50 states, a federal district, five major self-governing territories, and various possessions. At 3.8 million square miles, the United States is the world's third or fourth largest country by total area and is slightly smaller than the entire continent of Europe's 3.9 million square miles. With a population of over 327 million people, the U.S. is the third most populous country. The capital is Washington, D.C., and the largest city by population is New York City. Forty-eight states and the capital's federal district are contiguous in North America between Canada and Mexico. The State of Alaska is in the northwest corner of North America, bordered by Canada to the east and across the Bering Strait from Russia to the west. The State of Hawaii is an archipelago in the mid-Pacific Ocean. The U.S. territories are scattered about the Pacific Ocean and the Caribbean Sea, stretching across nine official time zones. The extremely diverse geography, climate, and wildlife of the United States make it one of the world's 17 megadiverse countries.
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