28530868587 has 8 divisors (see below), whose sum is σ = 40967401104. Its totient is φ = 17557457568.

The previous prime is 28530868543. The next prime is 28530868589. The reversal of 28530868587 is 78586803582.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28530868587 - 2¹⁵ = 28530835819 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28530868587.

It is not an unprimeable number, because it can be changed into a prime (28530868589) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 365780328 + ... + 365780405.

It is an arithmetic number, because the mean of its divisors is an integer number (5120925138).

Almost surely, 2^28530868587 is an apocalyptic number.

28530868587 is a deficient number, since it is larger than the sum of its proper divisors (12436532517).

28530868587 is a wasteful number, since it uses less digits than its factorization.

28530868587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731560749.

The product of its (nonzero) digits is 25804800, while the sum is 60.

The spelling of 28530868587 in words is "twenty-eight billion, five hundred thirty million, eight hundred sixty-eight thousand, five hundred eighty-seven".