28912832072 has 16 divisors (see below), whose sum is σ = 54219335100. Its totient is φ = 14454342720.

The previous prime is 28912832071. The next prime is 28912832101. The reversal of 28912832072 is 27023821982.

It can be written as a sum of positive squares in 2 ways, for example, as 26255017156 + 2657814916 = 162034^2 + 51554^2 .

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (28912832071) by changing a digit.

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, 199079 + ... + 312182.

Almost surely, 2^28912832072 is an apocalyptic number.

It is an amenable number.

28912832072 is a deficient number, since it is larger than the sum of its proper divisors (25306503028).

28912832072 is a wasteful number, since it uses less digits than its factorization.

28912832072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518336 (or 518332 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 44.

The spelling of 28912832072 in words is "twenty-eight billion, nine hundred twelve million, eight hundred thirty-two thousand, seventy-two".