28710271800 has 480 divisors, whose sum is σ = 117650565120. Its totient is φ = 6349881600.

The previous prime is 28710271783. The next prime is 28710271819. The reversal of 28710271800 is 817201782.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 3511317 + ... + 3519483.

It is an arithmetic number, because the mean of its divisors is an integer number (245105344).

Almost surely, 2^28710271800 is an apocalyptic number.

28710271800 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 28710271800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58825282560).

28710271800 is an abundant number, since it is smaller than the sum of its proper divisors (88940293320).

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

28710271800 is a wasteful number, since it uses less digits than its factorization.

28710271800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8233 (or 8215 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 36.

The spelling of 28710271800 in words is "twenty-eight billion, seven hundred ten million, two hundred seventy-one thousand, eight hundred".