28012167443 has 4 divisors (see below), whose sum is σ = 30166949568. Its totient is φ = 25857385320.

The previous prime is 28012167427. The next prime is 28012167487. The reversal of 28012167443 is 34476121082.

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

It is not a de Polignac number, because 28012167443 - 2⁴ = 28012167427 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28012167397 and 28012167406.

It is not an unprimeable number, because it can be changed into a prime (28012167143) 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, 1077391043 + ... + 1077391068.

It is an arithmetic number, because the mean of its divisors is an integer number (7541737392).

Almost surely, 2^28012167443 is an apocalyptic number.

28012167443 is a deficient number, since it is larger than the sum of its proper divisors (2154782125).

28012167443 is a wasteful number, since it uses less digits than its factorization.

28012167443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2154782124.

The product of its (nonzero) digits is 64512, while the sum is 38.

The spelling of 28012167443 in words is "twenty-eight billion, twelve million, one hundred sixty-seven thousand, four hundred forty-three".