28043087 has 4 divisors (see below), whose sum is σ = 29010120. Its totient is φ = 27076056.

The previous prime is 28043053. The next prime is 28043117. The reversal of 28043087 is 78034082.

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 28043087 - 2²⁰ = 26994511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28043027) by changing a digit.

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, 483473 + ... + 483530.

It is an arithmetic number, because the mean of its divisors is an integer number (7252530).

Almost surely, 2^28043087 is an apocalyptic number.

28043087 is a deficient number, since it is larger than the sum of its proper divisors (967033).

28043087 is an equidigital number, since it uses as much as digits as its factorization.

28043087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 967032.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 28043087 is about 5295.5723958794. The cubic root of 28043087 is about 303.8145763001.

The spelling of 28043087 in words is "twenty-eight million, forty-three thousand, eighty-seven".