28341778885 has 32 divisors (see below), whose sum is σ = 39622701312. Its totient is φ = 19057758720.

The previous prime is 28341778873. The next prime is 28341778903. The reversal of 28341778885 is 58887714382.

It is a happy number.

It is not a de Polignac number, because 28341778885 - 2⁹ = 28341778373 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 31 ways as a sum of consecutive naturals, for example, 6039390 + ... + 6044080.

It is an arithmetic number, because the mean of its divisors is an integer number (1238209416).

Almost surely, 2^28341778885 is an apocalyptic number.

It is an amenable number.

28341778885 is a deficient number, since it is larger than the sum of its proper divisors (11280922427).

28341778885 is a wasteful number, since it uses less digits than its factorization.

28341778885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8013.

The product of its digits is 24084480, while the sum is 61.

The spelling of 28341778885 in words is "twenty-eight billion, three hundred forty-one million, seven hundred seventy-eight thousand, eight hundred eighty-five".