28532239689 has 8 divisors (see below), whose sum is σ = 38524543360. Its totient is φ = 18780714576.

The previous prime is 28532239679. The next prime is 28532239709. The reversal of 28532239689 is 98693223582.

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

It is not a de Polignac number, because 28532239689 - 2¹¹ = 28532237641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28532239639) 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, 60194362 + ... + 60194835.

It is an arithmetic number, because the mean of its divisors is an integer number (4815567920).

Almost surely, 2^28532239689 is an apocalyptic number.

It is an amenable number.

28532239689 is a deficient number, since it is larger than the sum of its proper divisors (9992303671).

28532239689 is a wasteful number, since it uses less digits than its factorization.

28532239689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120389279.

The product of its digits is 11197440, while the sum is 57.

The spelling of 28532239689 in words is "twenty-eight billion, five hundred thirty-two million, two hundred thirty-nine thousand, six hundred eighty-nine".