28987175539 has 24 divisors (see below), whose sum is σ = 34350480000. Its totient is φ = 24383278080.

The previous prime is 28987175513. The next prime is 28987175669. The reversal of 28987175539 is 93557178982.

It is not a de Polignac number, because 28987175539 - 2¹¹ = 28987173491 is a prime.

It is a Smith number, since the sum of its digits (64) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28987175039) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1331262 + ... + 1352860.

It is an arithmetic number, because the mean of its divisors is an integer number (1431270000).

Almost surely, 2^28987175539 is an apocalyptic number.

28987175539 is a deficient number, since it is larger than the sum of its proper divisors (5363304461).

28987175539 is a wasteful number, since it uses less digits than its factorization.

28987175539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22123 (or 22116 counting only the distinct ones).

The product of its digits is 38102400, while the sum is 64.

The spelling of 28987175539 in words is "twenty-eight billion, nine hundred eighty-seven million, one hundred seventy-five thousand, five hundred thirty-nine".