28671643428576 has 48 divisors (see below), whose sum is σ = 75294515946384. Its totient is φ = 9553220578304.

The previous prime is 28671643428523. The next prime is 28671643428583. The reversal of 28671643428576 is 67582434617682.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 28671643428576.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62173731 + ... + 62633186.

It is an arithmetic number, because the mean of its divisors is an integer number (1568635748883).

Almost surely, 2^{28671643428576} is an apocalyptic number.

It is an amenable number.

28671643428576 is an abundant number, since it is smaller than the sum of its proper divisors (46622872517808).

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

28671643428576 is a wasteful number, since it uses less digits than its factorization.

28671643428576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124809323 (or 124809315 counting only the distinct ones).

The product of its digits is 650280960, while the sum is 69.

The spelling of 28671643428576 in words is "twenty-eight trillion, six hundred seventy-one billion, six hundred forty-three million, four hundred twenty-eight thousand, five hundred seventy-six".