28876865 has 16 divisors (see below), whose sum is σ = 37329600. Its totient is φ = 21373632.

The previous prime is 28876849. The next prime is 28876873. The reversal of 28876865 is 56867882.

It is not a de Polignac number, because 28876865 - 2⁴ = 28876849 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 551 + ... + 7619.

It is an arithmetic number, because the mean of its divisors is an integer number (2333100).

Almost surely, 2^28876865 is an apocalyptic number.

It is an amenable number.

28876865 is a deficient number, since it is larger than the sum of its proper divisors (8452735).

28876865 is a wasteful number, since it uses less digits than its factorization.

28876865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7136.

The product of its digits is 1290240, while the sum is 50.

The square root of 28876865 is about 5373.7198475544. The cubic root of 28876865 is about 306.7962268931.

The spelling of 28876865 in words is "twenty-eight million, eight hundred seventy-six thousand, eight hundred sixty-five".