28438485433 has 2 divisors, whose sum is σ = 28438485434. Its totient is φ = 28438485432.

The previous prime is 28438485431. The next prime is 28438485451. The reversal of 28438485433 is 33458483482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25891062649 + 2547422784 = 160907^2 + 50472^2 .

It is a cyclic number.

It is not a de Polignac number, because 28438485433 - 2¹ = 28438485431 is a prime.

Together with 28438485431, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (28438485431) by changing a digit.

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 as a sum of consecutive naturals, namely, 14219242716 + 14219242717.

It is an arithmetic number, because the mean of its divisors is an integer number (14219242717).

Almost surely, 2^28438485433 is an apocalyptic number.

It is an amenable number.

28438485433 is a deficient number, since it is larger than the sum of its proper divisors (1).

28438485433 is an equidigital number, since it uses as much as digits as its factorization.

28438485433 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8847360, while the sum is 52.

The spelling of 28438485433 in words is "twenty-eight billion, four hundred thirty-eight million, four hundred eighty-five thousand, four hundred thirty-three".