28344443563 has 4 divisors (see below), whose sum is σ = 28393567960. Its totient is φ = 28295319168.

The previous prime is 28344443551. The next prime is 28344443573. The reversal of 28344443563 is 36534444382.

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

It is a cyclic number.

It is not a de Polignac number, because 28344443563 - 2²⁹ = 27807572651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28344443503) 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, 24561333 + ... + 24562486.

It is an arithmetic number, because the mean of its divisors is an integer number (7098391990).

Almost surely, 2^28344443563 is an apocalyptic number.

28344443563 is a deficient number, since it is larger than the sum of its proper divisors (49124397).

28344443563 is an equidigital number, since it uses as much as digits as its factorization.

28344443563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49124396.

The product of its digits is 3317760, while the sum is 46.

The spelling of 28344443563 in words is "twenty-eight billion, three hundred forty-four million, four hundred forty-three thousand, five hundred sixty-three".