28933236 has 36 divisors (see below), whose sum is σ = 73300864. Its totient is φ = 9622800.

The previous prime is 28933217. The next prime is 28933259. The reversal of 28933236 is 63233982.

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 28933236.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28701 + ... + 29691.

Almost surely, 2^28933236 is an apocalyptic number.

It is an amenable number.

28933236 is an abundant number, since it is smaller than the sum of its proper divisors (44367628).

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

28933236 is a wasteful number, since it uses less digits than its factorization.

28933236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1812 (or 1807 counting only the distinct ones).

The product of its digits is 46656, while the sum is 36.

The square root of 28933236 is about 5378.9623534656. The cubic root of 28933236 is about 306.9957311067.

The spelling of 28933236 in words is "twenty-eight million, nine hundred thirty-three thousand, two hundred thirty-six".