28455432193 has 4 divisors (see below), whose sum is σ = 28845232708. Its totient is φ = 28065631680.

The previous prime is 28455432179. The next prime is 28455432197. The reversal of 28455432193 is 39123455482.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39123455482 = 2 ⋅19561727741.

It can be written as a sum of positive squares in 2 ways, for example, as 5152799089 + 23302633104 = 71783^2 + 152652^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28455432193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28455432197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194900148 + ... + 194900293.

It is an arithmetic number, because the mean of its divisors is an integer number (7211308177).

Almost surely, 2^28455432193 is an apocalyptic number.

It is an amenable number.

28455432193 is a deficient number, since it is larger than the sum of its proper divisors (389800515).

28455432193 is an equidigital number, since it uses as much as digits as its factorization.

28455432193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389800514.

The product of its digits is 1036800, while the sum is 46.

The spelling of 28455432193 in words is "twenty-eight billion, four hundred fifty-five million, four hundred thirty-two thousand, one hundred ninety-three".