28888949838 has 32 divisors (see below), whose sum is σ = 66773825280. Its totient is φ = 8161243200.

The previous prime is 28888949819. The next prime is 28888949891. The reversal of 28888949838 is 83894988882.

It is a self number, because there is not a number n which added to its sum of digits gives 28888949838.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 3860488 + ... + 3867963.

It is an arithmetic number, because the mean of its divisors is an integer number (2086682040).

Almost surely, 2^28888949838 is an apocalyptic number.

28888949838 is an abundant number, since it is smaller than the sum of its proper divisors (37884875442).

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

28888949838 is a wasteful number, since it uses less digits than its factorization.

28888949838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7728552.

The product of its digits is 509607936, while the sum is 75.

The spelling of 28888949838 in words is "twenty-eight billion, eight hundred eighty-eight million, nine hundred forty-nine thousand, eight hundred thirty-eight".