28839936771 has 48 divisors (see below), whose sum is σ = 45885399040. Its totient is φ = 17385425280.

The previous prime is 28839936767. The next prime is 28839936779. The reversal of 28839936771 is 17763993882.

It is not a de Polignac number, because 28839936771 - 2² = 28839936767 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28839936699 and 28839936708.

It is not an unprimeable number, because it can be changed into a prime (28839936779) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 349710 + ... + 424236.

Almost surely, 2^28839936771 is an apocalyptic number.

28839936771 is a deficient number, since it is larger than the sum of its proper divisors (17045462269).

28839936771 is a wasteful number, since it uses less digits than its factorization.

28839936771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74656 (or 74653 counting only the distinct ones).

The product of its digits is 27433728, while the sum is 63.

The spelling of 28839936771 in words is "twenty-eight billion, eight hundred thirty-nine million, nine hundred thirty-six thousand, seven hundred seventy-one".