28585878 has 16 divisors (see below), whose sum is σ = 57977856. Its totient is φ = 9394280.

The previous prime is 28585871. The next prime is 28585901. The reversal of 28585878 is 87858582.

It is a self number, because there is not a number n which added to its sum of digits gives 28585878.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28585871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33126 + ... + 33977.

It is an arithmetic number, because the mean of its divisors is an integer number (3623616).

Almost surely, 2^28585878 is an apocalyptic number.

28585878 is an abundant number, since it is smaller than the sum of its proper divisors (29391978).

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

28585878 is a wasteful number, since it uses less digits than its factorization.

28585878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67179.

The product of its digits is 1433600, while the sum is 51.

The square root of 28585878 is about 5346.5762876817. The cubic root of 28585878 is about 305.7622357398.

The spelling of 28585878 in words is "twenty-eight million, five hundred eighty-five thousand, eight hundred seventy-eight".