28235909522 has 6 divisors (see below), whose sum is σ = 42354220743. Its totient is φ = 14117835942.

The previous prime is 28235909489. The next prime is 28235909531. The reversal of 28235909522 is 22590953282.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 14117954761 + 14117954761 = 118819^2 + 118819^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=118819.

It is a Duffinian 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 2 ways as a sum of consecutive naturals, for example, 178229 + ... + 297047.

Almost surely, 2^28235909522 is an apocalyptic number.

28235909522 is a deficient number, since it is larger than the sum of its proper divisors (14118311221).

28235909522 is an frugal number, since it uses more digits than its factorization.

28235909522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237640 (or 118821 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 47.

The spelling of 28235909522 in words is "twenty-eight billion, two hundred thirty-five million, nine hundred nine thousand, five hundred twenty-two".