28636236 has 36 divisors (see below), whose sum is σ = 73309600. Its totient is φ = 9423648.

The previous prime is 28636213. The next prime is 28636247. The reversal of 28636236 is 63263682.

28636236 is a `hidden beast` number, since 28 + 6 + 3 + 623 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 28636236.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2191 + ... + 7878.

Almost surely, 2^28636236 is an apocalyptic number.

It is an amenable number.

28636236 is an abundant number, since it is smaller than the sum of its proper divisors (44673364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28636236 is a wasteful number, since it uses less digits than its factorization.

28636236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10158 (or 10153 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

The square root of 28636236 is about 5351.2835843375. The cubic root of 28636236 is about 305.9416779788.

The spelling of 28636236 in words is "twenty-eight million, six hundred thirty-six thousand, two hundred thirty-six".