28885774888 has 16 divisors (see below), whose sum is σ = 56515646880. Its totient is φ = 13814935728.

The previous prime is 28885774861. The next prime is 28885774991. The reversal of 28885774888 is 88847758882.

It is a super-2 number, since 2×28885774888² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28885774888.

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 3 ways as a sum of consecutive naturals, for example, 78493770 + ... + 78494137.

It is an arithmetic number, because the mean of its divisors is an integer number (3532227930).

Almost surely, 2^28885774888 is an apocalyptic number.

It is an amenable number.

28885774888 is a deficient number, since it is larger than the sum of its proper divisors (27629871992).

28885774888 is a wasteful number, since it uses less digits than its factorization.

28885774888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156987936 (or 156987932 counting only the distinct ones).

The product of its digits is 513802240, while the sum is 73.

The spelling of 28885774888 in words is "twenty-eight billion, eight hundred eighty-five million, seven hundred seventy-four thousand, eight hundred eighty-eight".