28881784888 has 32 divisors (see below), whose sum is σ = 60450255360. Its totient is φ = 12822778080.

The previous prime is 28881784873. The next prime is 28881784909. The reversal of 28881784888 is 88848718882.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3812520 + ... + 3820087.

It is an arithmetic number, because the mean of its divisors is an integer number (1889070480).

Almost surely, 2^28881784888 is an apocalyptic number.

It is an amenable number.

28881784888 is an abundant number, since it is smaller than the sum of its proper divisors (31568470472).

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

28881784888 is a wasteful number, since it uses less digits than its factorization.

28881784888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7632667 (or 7632663 counting only the distinct ones).

The product of its digits is 117440512, while the sum is 70.

The spelling of 28881784888 in words is "twenty-eight billion, eight hundred eighty-one million, seven hundred eighty-four thousand, eight hundred eighty-eight".