28875678 has 24 divisors (see below), whose sum is σ = 62537688. Its totient is φ = 8884512.

The previous prime is 28875659. The next prime is 28875683. The reversal of 28875678 is 87657882.

It is a self number, because there is not a number n which added to its sum of digits gives 28875678.

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, 13225 + ... + 15252.

It is an arithmetic number, because the mean of its divisors is an integer number (2605737).

Almost surely, 2^28875678 is an apocalyptic number.

28875678 is an abundant number, since it is smaller than the sum of its proper divisors (33662010).

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

28875678 is a wasteful number, since it uses less digits than its factorization.

28875678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28508 (or 28495 counting only the distinct ones).

The product of its digits is 1505280, while the sum is 51.

The square root of 28875678 is about 5373.6094015103. The cubic root of 28875678 is about 306.7920231575.

The spelling of 28875678 in words is "twenty-eight million, eight hundred seventy-five thousand, six hundred seventy-eight".