28384078133 has 4 divisors (see below), whose sum is σ = 28384741440. Its totient is φ = 28383414828.

The previous prime is 28384078117. The next prime is 28384078147. The reversal of 28384078133 is 33187048382.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 33187048382 = 2 ⋅16593524191.

It is a cyclic number.

It is not a de Polignac number, because 28384078133 - 2⁴ = 28384078117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28384072133) 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 in 3 ways as a sum of consecutive naturals, for example, 262685 + ... + 354642.

It is an arithmetic number, because the mean of its divisors is an integer number (7096185360).

Almost surely, 2^28384078133 is an apocalyptic number.

It is an amenable number.

28384078133 is a deficient number, since it is larger than the sum of its proper divisors (663307).

28384078133 is an equidigital number, since it uses as much as digits as its factorization.

28384078133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663306.

The product of its (nonzero) digits is 774144, while the sum is 47.

The spelling of 28384078133 in words is "twenty-eight billion, three hundred eighty-four million, seventy-eight thousand, one hundred thirty-three".