28600865 has 16 divisors (see below), whose sum is σ = 34933248. Its totient is φ = 22477056.

The previous prime is 28600861. The next prime is 28600883. The reversal of 28600865 is 56800682.

It is not a de Polignac number, because 28600865 - 2² = 28600861 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28600861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125882 + ... + 126108.

It is an arithmetic number, because the mean of its divisors is an integer number (2183328).

Almost surely, 2^28600865 is an apocalyptic number.

It is an amenable number.

28600865 is a deficient number, since it is larger than the sum of its proper divisors (6332383).

28600865 is a wasteful number, since it uses less digits than its factorization.

28600865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 28600865 is about 5347.9776551515. The cubic root of 28600865 is about 305.8156613979.

The spelling of 28600865 in words is "twenty-eight million, six hundred thousand, eight hundred sixty-five".