28158805191788 has 48 divisors (see below), whose sum is σ = 49812025159680. Its totient is φ = 13927630536000.

The previous prime is 28158805191761. The next prime is 28158805191821. The reversal of 28158805191788 is 88719150885182.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 337638398 + ... + 337721786.

It is an arithmetic number, because the mean of its divisors is an integer number (1037750524160).

Almost surely, 2^{28158805191788} is an apocalyptic number.

It is an amenable number.

28158805191788 is a deficient number, since it is larger than the sum of its proper divisors (21653219967892).

28158805191788 is a wasteful number, since it uses less digits than its factorization.

28158805191788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85878 (or 85876 counting only the distinct ones).

The product of its (nonzero) digits is 103219200, while the sum is 71.

The spelling of 28158805191788 in words is "twenty-eight trillion, one hundred fifty-eight billion, eight hundred five million, one hundred ninety-one thousand, seven hundred eighty-eight".