28865516 has 12 divisors (see below), whose sum is σ = 50660232. Its totient is φ = 14391168.

The previous prime is 28865479. The next prime is 28865519. The reversal of 28865516 is 61556882.

It is not an unprimeable number, because it can be changed into a prime (28865519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8810 + ... + 11633.

It is an arithmetic number, because the mean of its divisors is an integer number (4221686).

Almost surely, 2^28865516 is an apocalyptic number.

It is an amenable number.

28865516 is a deficient number, since it is larger than the sum of its proper divisors (21794716).

28865516 is a wasteful number, since it uses less digits than its factorization.

28865516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20800 (or 20798 counting only the distinct ones).

The product of its digits is 115200, while the sum is 41.

The square root of 28865516 is about 5372.6637713522. The cubic root of 28865516 is about 306.7560299325.

The spelling of 28865516 in words is "twenty-eight million, eight hundred sixty-five thousand, five hundred sixteen".