320

Number
$320$ (three hundred and twenty) is:


 * $2^6 \times 5$


 * The $50$th happy number after $1, 7, 10, 13, 19, 23, \ldots, 226, 230, 236, 239, 262, 263, 280, 291, 293, 301, 302, 310, 313, 319$:
 * $320 \to 3^2 + 2^2 + 0^2 = 9 + 4 + 0 = 13 \to 1^2 + 3^2 = 1 + 9 = 10 \to 1^2 + 0^2 = 1$


 * The $12$th positive integer after $64, 96, 128, 144, 160, 192, 216, 224, 240, 256, 288$ with $6$ or more prime factors:
 * $320 = 2 \times 2 \times 2 \times 2 \times 2 \times 2 \left({\times \, 5}\right)$


 * The $4$th positive integer after $128, 192, 256$ with $7$ or more prime factors:
 * $320 = 2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 5$


 * The $7$th positive integer after $200, 202, 204, 205, 206, 208$ that cannot be made into a prime number by changing just $1$ digit