28336678188 has 288 divisors, whose sum is σ = 85211546112. Its totient is φ = 7170508800.

The previous prime is 28336678171. The next prime is 28336678189. The reversal of 28336678188 is 88187663382.

It is not an unprimeable number, because it can be changed into a prime (28336678189) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 37235728 + ... + 37236488.

It is an arithmetic number, because the mean of its divisors is an integer number (295873424).

Almost surely, 2^28336678188 is an apocalyptic number.

28336678188 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28336678188, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42605773056).

28336678188 is an abundant number, since it is smaller than the sum of its proper divisors (56874867924).

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

28336678188 is a wasteful number, since it uses less digits than its factorization.

28336678188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905 (or 890 counting only the distinct ones).

The product of its digits is 18579456, while the sum is 60.

The spelling of 28336678188 in words is "twenty-eight billion, three hundred thirty-six million, six hundred seventy-eight thousand, one hundred eighty-eight".