28730880000 has 780 divisors, whose sum is σ = 109775454360. Its totient is φ = 7225344000.

The previous prime is 28730879999. The next prime is 28730880019. The reversal of 28730880000 is 8803782.

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 59 ways as a sum of consecutive naturals, for example, 668159979 + ... + 668160021.

It is an arithmetic number, because the mean of its divisors is an integer number (140737762).

Almost surely, 2^28730880000 is an apocalyptic number.

28730880000 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 28730880000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54887727180).

28730880000 is an abundant number, since it is smaller than the sum of its proper divisors (81044574360).

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

28730880000 is an equidigital number, since it uses as much as digits as its factorization.

28730880000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122 (or 82 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The spelling of 28730880000 in words is "twenty-eight billion, seven hundred thirty million, eight hundred eighty thousand".