28730362920 has 256 divisors, whose sum is σ = 100058112000. Its totient is φ = 6463881216.

The previous prime is 28730362909. The next prime is 28730362937. The reversal of 28730362920 is 2926303782.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 37360296 + ... + 37361064.

It is an arithmetic number, because the mean of its divisors is an integer number (390852000).

Almost surely, 2^28730362920 is an apocalyptic number.

28730362920 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 28730362920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50029056000).

28730362920 is an abundant number, since it is smaller than the sum of its proper divisors (71327749080).

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

28730362920 is a wasteful number, since it uses less digits than its factorization.

28730362920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1432 (or 1428 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 42.

The spelling of 28730362920 in words is "twenty-eight billion, seven hundred thirty million, three hundred sixty-two thousand, nine hundred twenty".