28384165838 has 32 divisors (see below), whose sum is σ = 51560411328. Its totient is φ = 11440281600.

The previous prime is 28384165811. The next prime is 28384165867. The reversal of 28384165838 is 83856148382.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 269258 + ... + 359538.

It is an arithmetic number, because the mean of its divisors is an integer number (1611262854).

Almost surely, 2^28384165838 is an apocalyptic number.

28384165838 is a deficient number, since it is larger than the sum of its proper divisors (23176245490).

28384165838 is a wasteful number, since it uses less digits than its factorization.

28384165838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91628.

The product of its digits is 8847360, while the sum is 56.

The spelling of 28384165838 in words is "twenty-eight billion, three hundred eighty-four million, one hundred sixty-five thousand, eight hundred thirty-eight".