28885091328 has 528 divisors, whose sum is σ = 93193850880. Its totient is φ = 8583708672.

The previous prime is 28885091281. The next prime is 28885091329. The reversal of 28885091328 is 82319058882.

28885091328 is a `hidden beast` number, since 28 + 88 + 509 + 1 + 32 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (28885091329) 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, 227441601 + ... + 227441727.

Almost surely, 2^28885091328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28885091328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46596925440).

28885091328 is an abundant number, since it is smaller than the sum of its proper divisors (64308759552).

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

28885091328 is a wasteful number, since it uses less digits than its factorization.

28885091328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242 (or 221 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 54.

The spelling of 28885091328 in words is "twenty-eight billion, eight hundred eighty-five million, ninety-one thousand, three hundred twenty-eight".