28579878 has 20 divisors (see below), whose sum is σ = 64040460. Its totient is φ = 9526572.

The previous prime is 28579867. The next prime is 28579891. The reversal of 28579878 is 87897582.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 88048 + ... + 88371.

It is an arithmetic number, because the mean of its divisors is an integer number (3202023).

Almost surely, 2^28579878 is an apocalyptic number.

28579878 is an abundant number, since it is smaller than the sum of its proper divisors (35460582).

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

28579878 is a wasteful number, since it uses less digits than its factorization.

28579878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176433 (or 176424 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 54.

The square root of 28579878 is about 5346.0151514937. The cubic root of 28579878 is about 305.7408417053.

The spelling of 28579878 in words is "twenty-eight million, five hundred seventy-nine thousand, eight hundred seventy-eight".