28716885 has 24 divisors (see below), whose sum is σ = 52397280. Its totient is φ = 14509152.

The previous prime is 28716841. The next prime is 28716899. The reversal of 28716885 is 58861782.

It is not a de Polignac number, because 28716885 - 2⁸ = 28716629 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28716885.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15939 + ... + 17648.

It is an arithmetic number, because the mean of its divisors is an integer number (2183220).

Almost surely, 2^28716885 is an apocalyptic number.

It is an amenable number.

28716885 is a deficient number, since it is larger than the sum of its proper divisors (23680395).

28716885 is a wasteful number, since it uses less digits than its factorization.

28716885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33617 (or 33614 counting only the distinct ones).

The product of its digits is 215040, while the sum is 45.

The square root of 28716885 is about 5358.8137679901. The cubic root of 28716885 is about 306.2286193598.

The spelling of 28716885 in words is "twenty-eight million, seven hundred sixteen thousand, eight hundred eighty-five".