28652921738 has 64 divisors (see below), whose sum is σ = 53654814720. Its totient is φ = 11206641600.

The previous prime is 28652921701. The next prime is 28652921771. The reversal of 28652921738 is 83712925682.

It is a self number, because there is not a number n which added to its sum of digits gives 28652921738.

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 31 ways as a sum of consecutive naturals, for example, 688508 + ... + 728936.

It is an arithmetic number, because the mean of its divisors is an integer number (838356480).

Almost surely, 2^28652921738 is an apocalyptic number.

28652921738 is a deficient number, since it is larger than the sum of its proper divisors (25001892982).

28652921738 is a wasteful number, since it uses less digits than its factorization.

28652921738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40563.

The product of its digits is 2903040, while the sum is 53.

The spelling of 28652921738 in words is "twenty-eight billion, six hundred fifty-two million, nine hundred twenty-one thousand, seven hundred thirty-eight".