28965865 has 8 divisors (see below), whose sum is σ = 35498880. Its totient is φ = 22679472.

The previous prime is 28965829. The next prime is 28965887. The reversal of 28965865 is 56856982.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28965865 - 2⁷ = 28965737 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61395 + ... + 61864.

It is an arithmetic number, because the mean of its divisors is an integer number (4437360).

Almost surely, 2^28965865 is an apocalyptic number.

It is an amenable number.

28965865 is a deficient number, since it is larger than the sum of its proper divisors (6533015).

28965865 is a wasteful number, since it uses less digits than its factorization.

28965865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123311.

The product of its digits is 1036800, while the sum is 49.

The square root of 28965865 is about 5381.9945187635. The cubic root of 28965865 is about 307.1110909484. Note that the first 3 decimals are identical.

The spelling of 28965865 in words is "twenty-eight million, nine hundred sixty-five thousand, eight hundred sixty-five".