28538192329 has 4 divisors (see below), whose sum is σ = 28539060676. Its totient is φ = 28537323984.

The previous prime is 28538192317. The next prime is 28538192363. The reversal of 28538192329 is 92329183582.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21265513929 + 7272678400 = 145827^2 + 85280^2 .

It is a cyclic number.

It is not a de Polignac number, because 28538192329 - 2⁵ = 28538192297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28538192029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 382854 + ... + 451279.

It is an arithmetic number, because the mean of its divisors is an integer number (7134765169).

Almost surely, 2^28538192329 is an apocalyptic number.

It is an amenable number.

28538192329 is a deficient number, since it is larger than the sum of its proper divisors (868347).

28538192329 is an equidigital number, since it uses as much as digits as its factorization.

28538192329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868346.

The product of its digits is 1866240, while the sum is 52.

The spelling of 28538192329 in words is "twenty-eight billion, five hundred thirty-eight million, one hundred ninety-two thousand, three hundred twenty-nine".