28671443 has 4 divisors (see below), whose sum is σ = 28683960. Its totient is φ = 28658928.

The previous prime is 28671431. The next prime is 28671451. The reversal of 28671443 is 34417682.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 28671443 - 2²⁰ = 27622867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28671493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1730 + ... + 7767.

It is an arithmetic number, because the mean of its divisors is an integer number (7170990).

Almost surely, 2^28671443 is an apocalyptic number.

28671443 is a deficient number, since it is larger than the sum of its proper divisors (12517).

28671443 is an equidigital number, since it uses as much as digits as its factorization.

28671443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12516.

The product of its digits is 32256, while the sum is 35.

The square root of 28671443 is about 5354.5721584455. The cubic root of 28671443 is about 306.0670072689.

The spelling of 28671443 in words is "twenty-eight million, six hundred seventy-one thousand, four hundred forty-three".