28385684116 has 6 divisors (see below), whose sum is σ = 49674947210. Its totient is φ = 14192842056.

The previous prime is 28385684111. The next prime is 28385684147. The reversal of 28385684116 is 61148658382.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 27091843216 + 1293840900 = 164596^2 + 35970^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28385684111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3548210511 + ... + 3548210518.

Almost surely, 2^28385684116 is an apocalyptic number.

It is an amenable number.

28385684116 is a deficient number, since it is larger than the sum of its proper divisors (21289263094).

28385684116 is a wasteful number, since it uses less digits than its factorization.

28385684116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7096421033 (or 7096421031 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 52.

The spelling of 28385684116 in words is "twenty-eight billion, three hundred eighty-five million, six hundred eighty-four thousand, one hundred sixteen".