28170359522 has 6 divisors (see below), whose sum is σ = 42255895329. Its totient is φ = 14085061080.

The previous prime is 28170359489. The next prime is 28170359533. The reversal of 28170359522 is 22595307182.

It can be written as a sum of positive squares in 2 ways, for example, as 23528798881 + 4641560641 = 153391^2 + 68129^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=118681.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 178022 + ... + 296702.

Almost surely, 2^28170359522 is an apocalyptic number.

28170359522 is a deficient number, since it is larger than the sum of its proper divisors (14085535807).

28170359522 is an frugal number, since it uses more digits than its factorization.

28170359522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237364 (or 118683 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 44.

The spelling of 28170359522 in words is "twenty-eight billion, one hundred seventy million, three hundred fifty-nine thousand, five hundred twenty-two".