28867805108740 has 96 divisors (see below), whose sum is σ = 65545534254816. Its totient is φ = 10616526213120.

The previous prime is 28867805108731. The next prime is 28867805108741. The reversal of 28867805108740 is 4780150876882.

It can be written as a sum of positive squares in 16 ways, for example, as 10041508919556 + 18826296189184 = 3168834^2 + 4338928^2 .

It is not an unprimeable number, because it can be changed into a prime (28867805108741) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74773000 + ... + 75158080.

It is an arithmetic number, because the mean of its divisors is an integer number (682765981821).

Almost surely, 2^{28867805108740} is an apocalyptic number.

28867805108740 is a gapful number since it is divisible by the number (20) 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 28867805108740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32772767127408).

28867805108740 is an abundant number, since it is smaller than the sum of its proper divisors (36677729146076).

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

28867805108740 is a wasteful number, since it uses less digits than its factorization.

28867805108740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386249 (or 386247 counting only the distinct ones).

The product of its (nonzero) digits is 48168960, while the sum is 64.

The spelling of 28867805108740 in words is "twenty-eight trillion, eight hundred sixty-seven billion, eight hundred five million, one hundred eight thousand, seven hundred forty".