28330061838 has 96 divisors (see below), whose sum is σ = 63012533472. Its totient is φ = 8482406400.

The previous prime is 28330061803. The next prime is 28330061849. The reversal of 28330061838 is 83816003382.

It is a self number, because there is not a number n which added to its sum of digits gives 28330061838.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23987608 + ... + 23988788.

It is an arithmetic number, because the mean of its divisors is an integer number (656380557).

Almost surely, 2^28330061838 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28330061838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31506266736).

28330061838 is an abundant number, since it is smaller than the sum of its proper divisors (34682471634).

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

28330061838 is a wasteful number, since it uses less digits than its factorization.

28330061838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1830 (or 1817 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The spelling of 28330061838 in words is "twenty-eight billion, three hundred thirty million, sixty-one thousand, eight hundred thirty-eight".