28046285 has 4 divisors (see below), whose sum is σ = 33655548. Its totient is φ = 22437024.

The previous prime is 28046279. The next prime is 28046327. The reversal of 28046285 is 58264082.

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

It can be written as a sum of positive squares in 2 ways, for example, as 18913801 + 9132484 = 4349^2 + 3022^2 .

It is a cyclic number.

It is not a de Polignac number, because 28046285 - 2¹⁰ = 28045261 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, 2804624 + ... + 2804633.

It is an arithmetic number, because the mean of its divisors is an integer number (8413887).

Almost surely, 2^28046285 is an apocalyptic number.

It is an amenable number.

28046285 is a deficient number, since it is larger than the sum of its proper divisors (5609263).

28046285 is an equidigital number, since it uses as much as digits as its factorization.

28046285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5609262.

The product of its (nonzero) digits is 30720, while the sum is 35.

The square root of 28046285 is about 5295.8743376330. The cubic root of 28046285 is about 303.8261247443.

The spelling of 28046285 in words is "twenty-eight million, forty-six thousand, two hundred eighty-five".