28636 has 6 divisors (see below), whose sum is σ = 50120. Its totient is φ = 14316.

The previous prime is 28631. The next prime is 28643. The reversal of 28636 is 63682.

28636 = T₆₃ + T₆₄ + ... + T₇₄.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 28636.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3576 + ... + 3583.

2²⁸⁶³⁶ is an apocalyptic number.

It is an amenable number.

28636 is a deficient number, since it is larger than the sum of its proper divisors (21484).

28636 is a wasteful number, since it uses less digits than its factorization.

28636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7163 (or 7161 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

The square root of 28636 is about 169.2217480113. The cubic root of 28636 is about 30.5940837523.

It can be divided in two parts, 286 and 36, that multiplied together give a triangular number (10296 = T₁₄₃).

The spelling of 28636 in words is "twenty-eight thousand, six hundred thirty-six".