28863309538 has 16 divisors (see below), whose sum is σ = 50413544640. Its totient is φ = 12136593456.

The previous prime is 28863309533. The next prime is 28863309547. The reversal of 28863309538 is 83590336882.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28863309533) 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, 19448928 + ... + 19450411.

It is an arithmetic number, because the mean of its divisors is an integer number (3150846540).

Almost surely, 2^28863309538 is an apocalyptic number.

28863309538 is a deficient number, since it is larger than the sum of its proper divisors (21550235102).

28863309538 is a wasteful number, since it uses less digits than its factorization.

28863309538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38899401.

The product of its (nonzero) digits is 7464960, while the sum is 55.

The spelling of 28863309538 in words is "twenty-eight billion, eight hundred sixty-three million, three hundred nine thousand, five hundred thirty-eight".