28818878 has 8 divisors (see below), whose sum is σ = 47158200. Its totient is φ = 13099480.

The previous prime is 28818863. The next prime is 28818883. The reversal of 28818878 is 87881882.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 654953 + ... + 654996.

It is an arithmetic number, because the mean of its divisors is an integer number (5894775).

Almost surely, 2^28818878 is an apocalyptic number.

28818878 is a deficient number, since it is larger than the sum of its proper divisors (18339322).

28818878 is a wasteful number, since it uses less digits than its factorization.

28818878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1309962.

The product of its digits is 458752, while the sum is 50.

The square root of 28818878 is about 5368.3217116712. The cubic root of 28818878 is about 306.5907323545.

The spelling of 28818878 in words is "twenty-eight million, eight hundred eighteen thousand, eight hundred seventy-eight".