28331009320 has 64 divisors (see below), whose sum is σ = 67689535680. Its totient is φ = 10634966016.

The previous prime is 28331009293. The next prime is 28331009419. The reversal of 28331009320 is 2390013382.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175927 + ... + 295993.

It is an arithmetic number, because the mean of its divisors is an integer number (1057648995).

Almost surely, 2^28331009320 is an apocalyptic number.

28331009320 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 28331009320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33844767840).

28331009320 is an abundant number, since it is smaller than the sum of its proper divisors (39358526360).

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

28331009320 is a wasteful number, since it uses less digits than its factorization.

28331009320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120442 (or 120438 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The spelling of 28331009320 in words is "twenty-eight billion, three hundred thirty-one million, nine thousand, three hundred twenty".