28901871688 has 64 divisors (see below), whose sum is σ = 56147644800. Its totient is φ = 13940935680.

The previous prime is 28901871667. The next prime is 28901871689. The reversal of 28901871688 is 88617810982.

It is not an unprimeable number, because it can be changed into a prime (28901871689) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 5490978 + ... + 5496238.

It is an arithmetic number, because the mean of its divisors is an integer number (877306950).

Almost surely, 2^28901871688 is an apocalyptic number.

It is an amenable number.

28901871688 is a deficient number, since it is larger than the sum of its proper divisors (27245773112).

28901871688 is a wasteful number, since it uses less digits than its factorization.

28901871688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5542 (or 5538 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 58.

The spelling of 28901871688 in words is "twenty-eight billion, nine hundred one million, eight hundred seventy-one thousand, six hundred eighty-eight".