28158694188 has 24 divisors (see below), whose sum is σ = 65801266608. Its totient is φ = 9372281856.

The previous prime is 28158694181. The next prime is 28158694199. The reversal of 28158694188 is 88149685182.

It is not an unprimeable number, because it can be changed into a prime (28158694181) 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, 1735281 + ... + 1751432.

It is an arithmetic number, because the mean of its divisors is an integer number (2741719442).

Almost surely, 2^28158694188 is an apocalyptic number.

It is an amenable number.

28158694188 is an abundant number, since it is smaller than the sum of its proper divisors (37642572420).

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

28158694188 is a wasteful number, since it uses less digits than its factorization.

28158694188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3487393 (or 3487391 counting only the distinct ones).

The product of its digits is 8847360, while the sum is 60.

The spelling of 28158694188 in words is "twenty-eight billion, one hundred fifty-eight million, six hundred ninety-four thousand, one hundred eighty-eight".