28929868 has 12 divisors (see below), whose sum is σ = 55229832. Its totient is φ = 13149920.

The previous prime is 28929853. The next prime is 28929877. The reversal of 28929868 is 86892982.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 328705 + ... + 328792.

It is an arithmetic number, because the mean of its divisors is an integer number (4602486).

Almost surely, 2^28929868 is an apocalyptic number.

It is an amenable number.

28929868 is a deficient number, since it is larger than the sum of its proper divisors (26299964).

28929868 is a wasteful number, since it uses less digits than its factorization.

28929868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657512 (or 657510 counting only the distinct ones).

The product of its digits is 995328, while the sum is 52.

The square root of 28929868 is about 5378.6492728193. The cubic root of 28929868 is about 306.9838186041.

The spelling of 28929868 in words is "twenty-eight million, nine hundred twenty-nine thousand, eight hundred sixty-eight".