28872664 has 32 divisors (see below), whose sum is σ = 58553280. Its totient is φ = 13295104.

The previous prime is 28872643. The next prime is 28872689. The reversal of 28872664 is 46627882.

It is a self number, because there is not a number n which added to its sum of digits gives 28872664.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4134 + ... + 8650.

It is an arithmetic number, because the mean of its divisors is an integer number (1829790).

Almost surely, 2^28872664 is an apocalyptic number.

It is an amenable number.

28872664 is an abundant number, since it is smaller than the sum of its proper divisors (29680616).

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

28872664 is a wasteful number, since it uses less digits than its factorization.

28872664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4587 (or 4583 counting only the distinct ones).

The product of its digits is 258048, while the sum is 43.

The square root of 28872664 is about 5373.3289495433. The cubic root of 28872664 is about 306.7813486222.

The spelling of 28872664 in words is "twenty-eight million, eight hundred seventy-two thousand, six hundred sixty-four".