28634015 has 4 divisors (see below), whose sum is σ = 34360824. Its totient is φ = 22907208.

The previous prime is 28634009. The next prime is 28634027. The reversal of 28634015 is 51043682.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28634015 - 2⁴ = 28633999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2863397 + ... + 2863406.

It is an arithmetic number, because the mean of its divisors is an integer number (8590206).

Almost surely, 2^28634015 is an apocalyptic number.

28634015 is a deficient number, since it is larger than the sum of its proper divisors (5726809).

28634015 is an equidigital number, since it uses as much as digits as its factorization.

28634015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5726808.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 28634015 is about 5351.0760600089. The cubic root of 28634015 is about 305.9337682563.

Adding to 28634015 its reverse (51043682), we get a palindrome (79677697).

The spelling of 28634015 in words is "twenty-eight million, six hundred thirty-four thousand, fifteen".