36

is the integer between.

Math features

 * 36 is an even number.
 * 36 is an abundant number.
 * 36 is a square number but it also is a highly composite number with 9 factors.
 * 36° is $$\frac{1}{10}$$ of a full 360° = 2&pi; radians. Therefore, 36° is equal to $$\frac{\pi}{5}$$ radians.
 * 36 is the first non-trivial square triangular number. It is actually the second one.
 * 36 is a palindrome in octal.
 * 36 is a Harshad number.
 * The harmonic mean of the digits of 36 is 1.