28082878 has 16 divisors (see below), whose sum is σ = 44770320. Its totient is φ = 13165696.

The previous prime is 28082867. The next prime is 28082891. The reversal of 28082878 is 87828082.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 8553 + ... + 11371.

It is an arithmetic number, because the mean of its divisors is an integer number (2798145).

Almost surely, 2^28082878 is an apocalyptic number.

28082878 is a deficient number, since it is larger than the sum of its proper divisors (16687442).

28082878 is a wasteful number, since it uses less digits than its factorization.

28082878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3131.

The product of its (nonzero) digits is 114688, while the sum is 43.

The square root of 28082878 is about 5299.3280706142. The cubic root of 28082878 is about 303.9582049536.

The spelling of 28082878 in words is "twenty-eight million, eighty-two thousand, eight hundred seventy-eight".