28525325538 has 8 divisors (see below), whose sum is σ = 57050651088. Its totient is φ = 9508441844.

The previous prime is 28525325513. The next prime is 28525325551. The reversal of 28525325538 is 83552352582.

It is a sphenic number, since it is the product of 3 distinct primes.

28525325538 is an admirable number.

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, 2377110456 + ... + 2377110467.

It is an arithmetic number, because the mean of its divisors is an integer number (7131331386).

Almost surely, 2^28525325538 is an apocalyptic number.

28525325538 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28525325538 is a wasteful number, since it uses less digits than its factorization.

28525325538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4754220928.

The product of its digits is 2880000, while the sum is 48.

The spelling of 28525325538 in words is "twenty-eight billion, five hundred twenty-five million, three hundred twenty-five thousand, five hundred thirty-eight".