28777311871 has 48 divisors (see below), whose sum is σ = 38398747680. Its totient is φ = 21295008000.

The previous prime is 28777311863. The next prime is 28777311917. The reversal of 28777311871 is 17811377782.

It is not a de Polignac number, because 28777311871 - 2³ = 28777311863 is a prime.

It is a super-3 number, since 3×28777311871³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28777311841) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 938401 + ... + 968581.

It is an arithmetic number, because the mean of its divisors is an integer number (799973910).

Almost surely, 2^28777311871 is an apocalyptic number.

28777311871 is a deficient number, since it is larger than the sum of its proper divisors (9621435809).

28777311871 is a wasteful number, since it uses less digits than its factorization.

28777311871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30296 (or 30289 counting only the distinct ones).

The product of its digits is 921984, while the sum is 52.

The spelling of 28777311871 in words is "twenty-eight billion, seven hundred seventy-seven million, three hundred eleven thousand, eight hundred seventy-one".