How much can you really learn from one number a day? Quite a bit actually, and this fun feature from the Mathematical Association of America (MAA) may prove to be rather addictive. Posted daily since September 2008, the MAA posts a number (for example, the number 11,185,272) and then offers a selection of that number's properties. Visitors to the site can click on some of the external links, look over the weblog archive, and also subscribe to their RSS feed. First-time visitors may wish to start by looking at the number 1529 (September 12, 2008), which happens to be the numerical address of MAA headquarters in Washington, D.C.