28874388916 has 6 divisors (see below), whose sum is σ = 50530180610. Its totient is φ = 14437194456.

The previous prime is 28874388859. The next prime is 28874388929. The reversal of 28874388916 is 61988347882.

It can be written as a sum of positive squares in only one way, i.e., 26960326416 + 1914062500 = 164196^2 + 43750^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3609298611 + ... + 3609298618.

Almost surely, 2^28874388916 is an apocalyptic number.

It is an amenable number.

28874388916 is a deficient number, since it is larger than the sum of its proper divisors (21655791694).

28874388916 is a wasteful number, since it uses less digits than its factorization.

28874388916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7218597233 (or 7218597231 counting only the distinct ones).

The product of its digits is 37158912, while the sum is 64.

The spelling of 28874388916 in words is "twenty-eight billion, eight hundred seventy-four million, three hundred eighty-eight thousand, nine hundred sixteen".