28704045 has 16 divisors (see below), whose sum is σ = 47168640. Its totient is φ = 14894784.

The previous prime is 28704017. The next prime is 28704061. The reversal of 28704045 is 54040782.

It is not a de Polignac number, because 28704045 - 2⁸ = 28703789 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 25305 + ... + 26414.

It is an arithmetic number, because the mean of its divisors is an integer number (2948040).

Almost surely, 2^28704045 is an apocalyptic number.

It is an amenable number.

28704045 is a deficient number, since it is larger than the sum of its proper divisors (18464595).

28704045 is a wasteful number, since it uses less digits than its factorization.

28704045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51764.

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 28704045 is about 5357.6156077121. The cubic root of 28704045 is about 306.1829718642.

The spelling of 28704045 in words is "twenty-eight million, seven hundred four thousand, forty-five".