The number "78" is an integer that follows 77 and precedes 79. It is an even number, meaning it is divisible by 2 without a remainder. In mathematics, 78 can be expressed as the product of its prime factors, which are 2 and 39. In terms of cultural significance, 78 can refer to the 78 RPM record, a format used for playing music in the early 20th century. These records were made of shellac and typically held about three to five minutes of audio per side, influencing the development of the music industry.