28651784700 has 576 divisors, whose sum is σ = 111742848000. Its totient is φ = 5599641600.

The previous prime is 28651784663. The next prime is 28651784713. The reversal of 28651784700 is 748715682.

It is a self number, because there is not a number n which added to its sum of digits gives 28651784700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 19241556 + ... + 19243044.

It is an arithmetic number, because the mean of its divisors is an integer number (193998000).

Almost surely, 2^28651784700 is an apocalyptic number.

28651784700 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 28651784700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55871424000).

28651784700 is an abundant number, since it is smaller than the sum of its proper divisors (83091063300).

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

28651784700 is a wasteful number, since it uses less digits than its factorization.

28651784700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1555 (or 1534 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 48.

The spelling of 28651784700 in words is "twenty-eight billion, six hundred fifty-one million, seven hundred eighty-four thousand, seven hundred".