28128884382 has 12 divisors (see below), whose sum is σ = 60945916200. Its totient is φ = 9376294788.

The previous prime is 28128884353. The next prime is 28128884383. The reversal of 28128884382 is 28348882182.

28128884382 is a `hidden beast` number, since 2 + 8 + 128 + 88 + 438 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28128884383) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 781357882 + ... + 781357917.

It is an arithmetic number, because the mean of its divisors is an integer number (5078826350).

Almost surely, 2^28128884382 is an apocalyptic number.

28128884382 is an abundant number, since it is smaller than the sum of its proper divisors (32817031818).

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

28128884382 is a wasteful number, since it uses less digits than its factorization.

28128884382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1562715807 (or 1562715804 counting only the distinct ones).

The product of its digits is 3145728, while the sum is 54.

The spelling of 28128884382 in words is "twenty-eight billion, one hundred twenty-eight million, eight hundred eighty-four thousand, three hundred eighty-two".