28220882443 has 4 divisors (see below), whose sum is σ = 30391719568. Its totient is φ = 26050045320.

The previous prime is 28220882441. The next prime is 28220882483. The reversal of 28220882443 is 34428802282.

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

It is not a de Polignac number, because 28220882443 - 2¹ = 28220882441 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28220882443.

It is not an unprimeable number, because it can be changed into a prime (28220882441) 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, 1085418543 + ... + 1085418568.

It is an arithmetic number, because the mean of its divisors is an integer number (7597929892).

Almost surely, 2^28220882443 is an apocalyptic number.

28220882443 is a deficient number, since it is larger than the sum of its proper divisors (2170837125).

28220882443 is a wasteful number, since it uses less digits than its factorization.

28220882443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2170837124.

The product of its (nonzero) digits is 393216, while the sum is 43.

The spelling of 28220882443 in words is "twenty-eight billion, two hundred twenty million, eight hundred eighty-two thousand, four hundred forty-three".