28388325330 has 192 divisors, whose sum is σ = 83458252800. Its totient is φ = 6656993280.

The previous prime is 28388325323. The next prime is 28388325341. The reversal of 28388325330 is 3352388382.

28388325330 is a `hidden beast` number, since 2 + 8 + 3 + 88 + 32 + 533 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 95 ways as a sum of consecutive naturals, for example, 1365151 + ... + 1385789.

It is an arithmetic number, because the mean of its divisors is an integer number (434678400).

Almost surely, 2^28388325330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28388325330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41729126400).

28388325330 is an abundant number, since it is smaller than the sum of its proper divisors (55069927470).

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

28388325330 is a wasteful number, since it uses less digits than its factorization.

28388325330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20729 (or 20726 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 45.

The spelling of 28388325330 in words is "twenty-eight billion, three hundred eighty-eight million, three hundred twenty-five thousand, three hundred thirty".