28915066388 has 48 divisors (see below), whose sum is σ = 54978827904. Its totient is φ = 13227131520.

The previous prime is 28915066379. The next prime is 28915066391. The reversal of 28915066388 is 88366051982.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 2884481 + ... + 2894487.

It is an arithmetic number, because the mean of its divisors is an integer number (1145392248).

Almost surely, 2^28915066388 is an apocalyptic number.

It is an amenable number.

28915066388 is a deficient number, since it is larger than the sum of its proper divisors (26063761516).

28915066388 is a wasteful number, since it uses less digits than its factorization.

28915066388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10512 (or 10510 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 56.

The spelling of 28915066388 in words is "twenty-eight billion, nine hundred fifteen million, sixty-six thousand, three hundred eighty-eight".