28287318687 has 8 divisors (see below), whose sum is σ = 37718067504. Its totient is φ = 18857391168.

The previous prime is 28287318679. The next prime is 28287318713. The reversal of 28287318687 is 78681378282.

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

It is not a de Polignac number, because 28287318687 - 2³ = 28287318679 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28287318687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28287318667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119878 + ... + 266355.

It is an arithmetic number, because the mean of its divisors is an integer number (4714758438).

Almost surely, 2^28287318687 is an apocalyptic number.

28287318687 is a deficient number, since it is larger than the sum of its proper divisors (9430748817).

28287318687 is a wasteful number, since it uses less digits than its factorization.

28287318687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410649.

The product of its digits is 14450688, while the sum is 60.

The spelling of 28287318687 in words is "twenty-eight billion, two hundred eighty-seven million, three hundred eighteen thousand, six hundred eighty-seven".