28788913192885 has 8 divisors (see below), whose sum is σ = 34547246306136. Its totient is φ = 23030763571200.

The previous prime is 28788913192771. The next prime is 28788913192903. The reversal of 28788913192885 is 58829131988782.

It can be written as a sum of positive squares in 4 ways, for example, as 13424003044 + 28775489189841 = 115862^2 + 5364279^2 .

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

It is not a de Polignac number, because 28788913192885 - 2¹⁹ = 28788912668597 is a prime.

It is a Duffinian number.

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, 45527484 + ... + 46155493.

It is an arithmetic number, because the mean of its divisors is an integer number (4318405788267).

Almost surely, 2^{28788913192885} is an apocalyptic number.

It is an amenable number.

28788913192885 is a deficient number, since it is larger than the sum of its proper divisors (5758333113251).

28788913192885 is an equidigital number, since it uses as much as digits as its factorization.

28788913192885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91745783.

The product of its digits is 1114767360, while the sum is 79.

The spelling of 28788913192885 in words is "twenty-eight trillion, seven hundred eighty-eight billion, nine hundred thirteen million, one hundred ninety-two thousand, eight hundred eighty-five".