28241587 has 4 divisors (see below), whose sum is σ = 30809016. Its totient is φ = 25674160.

The previous prime is 28241567. The next prime is 28241593. The reversal of 28241587 is 78514282.

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 28241587 - 2⁷ = 28241459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28241557) 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, 1283698 + ... + 1283719.

It is an arithmetic number, because the mean of its divisors is an integer number (7702254).

Almost surely, 2^28241587 is an apocalyptic number.

28241587 is a deficient number, since it is larger than the sum of its proper divisors (2567429).

28241587 is a wasteful number, since it uses less digits than its factorization.

28241587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2567428.

The product of its digits is 35840, while the sum is 37.

The square root of 28241587 is about 5314.2814189691. The cubic root of 28241587 is about 304.5297312525.

The spelling of 28241587 in words is "twenty-eight million, two hundred forty-one thousand, five hundred eighty-seven".