The number "138" is an integer that follows 137 and precedes 139. It is an even number, meaning it is divisible by 2 without a remainder. In mathematics, 138 can be expressed as the product of its prime factors: 2 and 69, or further as 2, 3, and 23. In various contexts, "138" may hold significance. For example, in the realm of music, it can refer to a specific tempo marking. In numerology, it may be interpreted as a combination of the energies of the numbers 1, 3, and 8, each contributing to its overall meaning.