28831372188 has 24 divisors (see below), whose sum is σ = 67512616080. Its totient is φ = 9576255360.

The previous prime is 28831372181. The next prime is 28831372189. The reversal of 28831372188 is 88127313882.

It is a self number, because there is not a number n which added to its sum of digits gives 28831372188.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28831372181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4271743 + ... + 4278486.

It is an arithmetic number, because the mean of its divisors is an integer number (2813025670).

Almost surely, 2^28831372188 is an apocalyptic number.

It is an amenable number.

28831372188 is an abundant number, since it is smaller than the sum of its proper divisors (38681243892).

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

28831372188 is a wasteful number, since it uses less digits than its factorization.

28831372188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8550517 (or 8550515 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 51.

The spelling of 28831372188 in words is "twenty-eight billion, eight hundred thirty-one million, three hundred seventy-two thousand, one hundred eighty-eight".