28384468393 has 4 divisors (see below), whose sum is σ = 28385215488. Its totient is φ = 28383721300.

The previous prime is 28384468367. The next prime is 28384468423. The reversal of 28384468393 is 39386448382.

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: 39386448382 = 2 ⋅19693224191.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28384468393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28384468493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 313321 + ... + 393622.

It is an arithmetic number, because the mean of its divisors is an integer number (7096303872).

Almost surely, 2^28384468393 is an apocalyptic number.

It is an amenable number.

28384468393 is a deficient number, since it is larger than the sum of its proper divisors (747095).

28384468393 is an equidigital number, since it uses as much as digits as its factorization.

28384468393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747094.

The product of its digits is 23887872, while the sum is 58.

The spelling of 28384468393 in words is "twenty-eight billion, three hundred eighty-four million, four hundred sixty-eight thousand, three hundred ninety-three".