28285138885 has 8 divisors (see below), whose sum is σ = 35037075456. Its totient is φ = 21898171920.

The previous prime is 28285138867. The next prime is 28285138909. The reversal of 28285138885 is 58883158282.

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

It is not a de Polignac number, because 28285138885 - 2⁵ = 28285138853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91242229 + ... + 91242538.

It is an arithmetic number, because the mean of its divisors is an integer number (4379634432).

Almost surely, 2^28285138885 is an apocalyptic number.

It is an amenable number.

28285138885 is a deficient number, since it is larger than the sum of its proper divisors (6751936571).

28285138885 is a wasteful number, since it uses less digits than its factorization.

28285138885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182484803.

The product of its digits is 9830400, while the sum is 58.

The spelling of 28285138885 in words is "twenty-eight billion, two hundred eighty-five million, one hundred thirty-eight thousand, eight hundred eighty-five".