28959865 has 8 divisors (see below), whose sum is σ = 37911168. Its totient is φ = 21061680.

The previous prime is 28959841. The next prime is 28959877. The reversal of 28959865 is 56895982.

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

It is not a de Polignac number, because 28959865 - 2¹⁵ = 28927097 is a prime.

It is a Duffinian number.

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, 263217 + ... + 263326.

It is an arithmetic number, because the mean of its divisors is an integer number (4738896).

Almost surely, 2^28959865 is an apocalyptic number.

It is an amenable number.

28959865 is a deficient number, since it is larger than the sum of its proper divisors (8951303).

28959865 is a wasteful number, since it uses less digits than its factorization.

28959865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526559.

The product of its digits is 1555200, while the sum is 52.

The square root of 28959865 is about 5381.4370757261. The cubic root of 28959865 is about 307.0898844491.

The spelling of 28959865 in words is "twenty-eight million, nine hundred fifty-nine thousand, eight hundred sixty-five".