28720633300 has 72 divisors (see below), whose sum is σ = 63005342400. Its totient is φ = 11362897920.

The previous prime is 28720633297. The next prime is 28720633351. The reversal of 28720633300 is 333602782.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14511711 + ... + 14513689.

It is an arithmetic number, because the mean of its divisors is an integer number (875074200).

Almost surely, 2^28720633300 is an apocalyptic number.

28720633300 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 28720633300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31502671200).

28720633300 is an abundant number, since it is smaller than the sum of its proper divisors (34284709100).

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

28720633300 is a wasteful number, since it uses less digits than its factorization.

28720633300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3505 (or 3498 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 34.

The spelling of 28720633300 in words is "twenty-eight billion, seven hundred twenty million, six hundred thirty-three thousand, three hundred".