28443030755 has 4 divisors (see below), whose sum is σ = 34131636912. Its totient is φ = 22754424600.

The previous prime is 28443030697. The next prime is 28443030767. The reversal of 28443030755 is 55703034482.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55703034482 = 2 ⋅27851517241.

It is not a de Polignac number, because 28443030755 - 2⁶ = 28443030691 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2844303071 + ... + 2844303080.

It is an arithmetic number, because the mean of its divisors is an integer number (8532909228).

Almost surely, 2^28443030755 is an apocalyptic number.

28443030755 is a deficient number, since it is larger than the sum of its proper divisors (5688606157).

28443030755 is an equidigital number, since it uses as much as digits as its factorization.

28443030755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5688606156.

The product of its (nonzero) digits is 403200, while the sum is 41.

The spelling of 28443030755 in words is "twenty-eight billion, four hundred forty-three million, thirty thousand, seven hundred fifty-five".