28816684128 has 72 divisors (see below), whose sum is σ = 82573106616. Its totient is φ = 9532224000.

The previous prime is 28816684111. The next prime is 28816684151. The reversal of 28816684128 is 82148661882.

28816684128 is a `hidden beast` number, since 288 + 166 + 84 + 128 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 344173 + ... + 419628.

It is an arithmetic number, because the mean of its divisors is an integer number (1146848703).

Almost surely, 2^28816684128 is an apocalyptic number.

It is an amenable number.

28816684128 is an abundant number, since it is smaller than the sum of its proper divisors (53756422488).

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

28816684128 is a wasteful number, since it uses less digits than its factorization.

28816684128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763948 (or 763937 counting only the distinct ones).

The product of its digits is 2359296, while the sum is 54.

The spelling of 28816684128 in words is "twenty-eight billion, eight hundred sixteen million, six hundred eighty-four thousand, one hundred twenty-eight".