28878508 has 12 divisors (see below), whose sum is σ = 51230200. Its totient is φ = 14241312.

The previous prime is 28878497. The next prime is 28878517. The reversal of 28878508 is 80587882.

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 3 ways as a sum of consecutive naturals, for example, 49158 + ... + 49741.

Almost surely, 2^28878508 is an apocalyptic number.

It is an amenable number.

28878508 is a deficient number, since it is larger than the sum of its proper divisors (22351692).

28878508 is a wasteful number, since it uses less digits than its factorization.

28878508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98976 (or 98974 counting only the distinct ones).

The product of its (nonzero) digits is 286720, while the sum is 46.

The square root of 28878508 is about 5373.8727189988. The cubic root of 28878508 is about 306.8020453530.

The spelling of 28878508 in words is "twenty-eight million, eight hundred seventy-eight thousand, five hundred eight".