28128764741 has 8 divisors (see below), whose sum is σ = 35069628864. Its totient is φ = 21918517920.

The previous prime is 28128764731. The next prime is 28128764743. The reversal of 28128764741 is 14746782182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28128764741 - 2¹⁰ = 28128763717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28128764741.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28128764743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182654240 + ... + 182654393.

It is an arithmetic number, because the mean of its divisors is an integer number (4383703608).

Almost surely, 2^28128764741 is an apocalyptic number.

It is an amenable number.

28128764741 is a deficient number, since it is larger than the sum of its proper divisors (6940864123).

28128764741 is a wasteful number, since it uses less digits than its factorization.

28128764741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365308651.

The product of its digits is 1204224, while the sum is 50.

The spelling of 28128764741 in words is "twenty-eight billion, one hundred twenty-eight million, seven hundred sixty-four thousand, seven hundred forty-one".