28875065 has 8 divisors (see below), whose sum is σ = 34705608. Its totient is φ = 23063040.

The previous prime is 28875037. The next prime is 28875073. The reversal of 28875065 is 56057882.

It can be written as a sum of positive squares in 4 ways, for example, as 657721 + 28217344 = 811^2 + 5312^2 .

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

It is not a de Polignac number, because 28875065 - 2⁸ = 28874809 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 926 + ... + 7655.

It is an arithmetic number, because the mean of its divisors is an integer number (4338201).

Almost surely, 2^28875065 is an apocalyptic number.

It is an amenable number.

28875065 is a deficient number, since it is larger than the sum of its proper divisors (5830543).

28875065 is an equidigital number, since it uses as much as digits as its factorization.

28875065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9259.

The product of its (nonzero) digits is 134400, while the sum is 41.

The square root of 28875065 is about 5373.5523631951. The cubic root of 28875065 is about 306.7898521858.

The spelling of 28875065 in words is "twenty-eight million, eight hundred seventy-five thousand, sixty-five".