28347064308 has 18 divisors (see below), whose sum is σ = 71655079314. Its totient is φ = 9449021424.

The previous prime is 28347064289. The next prime is 28347064309. The reversal of 28347064308 is 80346074382.

28347064308 is a `hidden beast` number, since 283 + 4 + 7 + 0 + 64 + 308 = 666.

It can be written as a sum of positive squares in only one way, i.e., 28048880484 + 298183824 = 167478^2 + 17268^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28347064309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 393709191 + ... + 393709262.

Almost surely, 2^28347064308 is an apocalyptic number.

It is an amenable number.

28347064308 is an abundant number, since it is smaller than the sum of its proper divisors (43308015006).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28347064308 is a wasteful number, since it uses less digits than its factorization.

28347064308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787418463 (or 787418458 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 45.

The spelling of 28347064308 in words is "twenty-eight billion, three hundred forty-seven million, sixty-four thousand, three hundred eight".