28904908 has 6 divisors (see below), whose sum is σ = 50583596. Its totient is φ = 14452452.

The previous prime is 28904893. The next prime is 28904917. The reversal of 28904908 is 80940982.

It is a happy number.

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 as a sum of consecutive naturals, namely, 3613110 + ... + 3613117.

Almost surely, 2^28904908 is an apocalyptic number.

It is an amenable number.

28904908 is a deficient number, since it is larger than the sum of its proper divisors (21678688).

28904908 is a wasteful number, since it uses less digits than its factorization.

28904908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7226231 (or 7226229 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 28904908 is about 5376.3284869881. The cubic root of 28904908 is about 306.8955070963.

The spelling of 28904908 in words is "twenty-eight million, nine hundred four thousand, nine hundred eight".