28388363107788 has 48 divisors (see below), whose sum is σ = 73600243368960. Its totient is φ = 9462686972112.

The previous prime is 28388363107781. The next prime is 28388363107799. The reversal of 28388363107788 is 88770136388382.

28388363107788 is a `hidden beast` number, since 2 + 8 + 3 + 88 + 363 + 107 + 7 + 88 = 666.

It is not an unprimeable number, because it can be changed into a prime (28388363107781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9160945 + ... + 11861687.

It is an arithmetic number, because the mean of its divisors is an integer number (1533338403520).

Almost surely, 2^{28388363107788} is an apocalyptic number.

It is an amenable number.

28388363107788 is an abundant number, since it is smaller than the sum of its proper divisors (45211880261172).

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

28388363107788 is a wasteful number, since it uses less digits than its factorization.

28388363107788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2798083 (or 2798075 counting only the distinct ones).

The product of its (nonzero) digits is 520224768, while the sum is 72.

The spelling of 28388363107788 in words is "twenty-eight trillion, three hundred eighty-eight billion, three hundred sixty-three million, one hundred seven thousand, seven hundred eighty-eight".