28381259108 has 12 divisors (see below), whose sum is σ = 49924547820. Its totient is φ = 14117102592.

The previous prime is 28381259033. The next prime is 28381259131. The reversal of 28381259108 is 80195218382.

It can be written as a sum of positive squares in 2 ways, for example, as 11742323044 + 16638936064 = 108362^2 + 128992^2 .

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 3 ways as a sum of consecutive naturals, for example, 18380873 + ... + 18382416.

It is an arithmetic number, because the mean of its divisors is an integer number (4160378985).

Almost surely, 2^28381259108 is an apocalyptic number.

It is an amenable number.

28381259108 is a deficient number, since it is larger than the sum of its proper divisors (21543288712).

28381259108 is a wasteful number, since it uses less digits than its factorization.

28381259108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36763486 (or 36763484 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 47.

The spelling of 28381259108 in words is "twenty-eight billion, three hundred eighty-one million, two hundred fifty-nine thousand, one hundred eight".