28868627928 has 256 divisors, whose sum is σ = 93000960000. Its totient is φ = 7424643072.

The previous prime is 28868627917. The next prime is 28868627939. The reversal of 28868627928 is 82972686882.

It is an interprime number because it is at equal distance from previous prime (28868627917) and next prime (28868627939).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3214228 + ... + 3223196.

It is an arithmetic number, because the mean of its divisors is an integer number (363285000).

Almost surely, 2^28868627928 is an apocalyptic number.

28868627928 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 28868627928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46500480000).

28868627928 is an abundant number, since it is smaller than the sum of its proper divisors (64132332072).

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

28868627928 is a wasteful number, since it uses less digits than its factorization.

28868627928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9039 (or 9021 counting only the distinct ones).

The product of its digits is 74317824, while the sum is 66.

The spelling of 28868627928 in words is "twenty-eight billion, eight hundred sixty-eight million, six hundred twenty-seven thousand, nine hundred twenty-eight".