28538044672 has 36 divisors (see below), whose sum is σ = 56976017616. Its totient is φ = 14266165760.

The previous prime is 28538044637. The next prime is 28538044679. The reversal of 28538044672 is 27644083582.

It is not an unprimeable number, because it can be changed into a prime (28538044679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1924647 + ... + 1939417.

It is an arithmetic number, because the mean of its divisors is an integer number (1582667156).

Almost surely, 2^28538044672 is an apocalyptic number.

It is an amenable number.

28538044672 is a deficient number, since it is larger than the sum of its proper divisors (28437972944).

28538044672 is an equidigital number, since it uses as much as digits as its factorization.

28538044672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22334 (or 22320 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 49.

The spelling of 28538044672 in words is "twenty-eight billion, five hundred thirty-eight million, forty-four thousand, six hundred seventy-two".