28873345530 has 96 divisors (see below), whose sum is σ = 75602399616. Its totient is φ = 7050710016.

The previous prime is 28873345511. The next prime is 28873345531. The reversal of 28873345530 is 3554337882.

It is a self number, because there is not a number n which added to its sum of digits gives 28873345530.

It is not an unprimeable number, because it can be changed into a prime (28873345531) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 275787 + ... + 365793.

It is an arithmetic number, because the mean of its divisors is an integer number (787524996).

Almost surely, 2^28873345530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28873345530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37801199808).

28873345530 is an abundant number, since it is smaller than the sum of its proper divisors (46729054086).

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

28873345530 is a wasteful number, since it uses less digits than its factorization.

28873345530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90088 (or 90071 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 48.

The spelling of 28873345530 in words is "twenty-eight billion, eight hundred seventy-three million, three hundred forty-five thousand, five hundred thirty".