28765916 has 12 divisors (see below), whose sum is σ = 52529232. Its totient is φ = 13757568.

The previous prime is 28765907. The next prime is 28765967. The reversal of 28765916 is 61956782.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156245 + ... + 156428.

It is an arithmetic number, because the mean of its divisors is an integer number (4377436).

Almost surely, 2^28765916 is an apocalyptic number.

It is an amenable number.

28765916 is a deficient number, since it is larger than the sum of its proper divisors (23763316).

28765916 is a wasteful number, since it uses less digits than its factorization.

28765916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312700 (or 312698 counting only the distinct ones).

The product of its digits is 181440, while the sum is 44.

The square root of 28765916 is about 5363.3866166817. The cubic root of 28765916 is about 306.4028044337.

The spelling of 28765916 in words is "twenty-eight million, seven hundred sixty-five thousand, nine hundred sixteen".