28683781200 has 180 divisors, whose sum is σ = 99808076160. Its totient is φ = 7628463360.

The previous prime is 28683781177. The next prime is 28683781211. The reversal of 28683781200 is 218738682.

It is a tau number, because it is divible by the number of its divisors (180).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1353889 + ... + 1374911.

It is an arithmetic number, because the mean of its divisors is an integer number (554489312).

Almost surely, 2^28683781200 is an apocalyptic number.

28683781200 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 28683781200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49904038080).

28683781200 is an abundant number, since it is smaller than the sum of its proper divisors (71124294960).

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

28683781200 is a wasteful number, since it uses less digits than its factorization.

28683781200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21426 (or 21412 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The spelling of 28683781200 in words is "twenty-eight billion, six hundred eighty-three million, seven hundred eighty-one thousand, two hundred".