28768732938 has 48 divisors (see below), whose sum is σ = 68023159776. Its totient is φ = 8714677920.

The previous prime is 28768732907. The next prime is 28768732939. The reversal of 28768732938 is 83923786782.

28768732938 is a `hidden beast` number, since 287 + 68 + 7 + 3 + 293 + 8 = 666.

It is a super-2 number, since 2×28768732938² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28768732939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 562156 + ... + 611192.

It is an arithmetic number, because the mean of its divisors is an integer number (1417149162).

Almost surely, 2^28768732938 is an apocalyptic number.

28768732938 is an abundant number, since it is smaller than the sum of its proper divisors (39254426838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28768732938 is a wasteful number, since it uses less digits than its factorization.

28768732938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52019 (or 52016 counting only the distinct ones).

The product of its digits is 48771072, while the sum is 63.

The spelling of 28768732938 in words is "twenty-eight billion, seven hundred sixty-eight million, seven hundred thirty-two thousand, nine hundred thirty-eight".