28289165522 has 6 divisors (see below), whose sum is σ = 42434105079. Its totient is φ = 14144463830.

The previous prime is 28289165519. The next prime is 28289165539. The reversal of 28289165522 is 22556198282.

It can be written as a sum of positive squares in only one way, i.e., 14144582761 + 14144582761 = 118931^2 + 118931^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=118931.

It is a super-2 number, since 2×28289165522² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 178397 + ... + 297327.

Almost surely, 2^28289165522 is an apocalyptic number.

28289165522 is a deficient number, since it is larger than the sum of its proper divisors (14144939557).

28289165522 is an frugal number, since it uses more digits than its factorization.

28289165522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237864 (or 118933 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 50.

Multiplying 28289165522 by its sum of digits (50), we get a square (1414458276100 = 1189310²).

The spelling of 28289165522 in words is "twenty-eight billion, two hundred eighty-nine million, one hundred sixty-five thousand, five hundred twenty-two".