28143043 has 4 divisors (see below), whose sum is σ = 28173528. Its totient is φ = 28112560.

The previous prime is 28143013. The next prime is 28143061. The reversal of 28143043 is 34034182.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28143043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28142999 and 28143017.

It is not an unprimeable number, because it can be changed into a prime (28143013) 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, 13813 + ... + 15718.

It is an arithmetic number, because the mean of its divisors is an integer number (7043382).

Almost surely, 2^28143043 is an apocalyptic number.

28143043 is a deficient number, since it is larger than the sum of its proper divisors (30485).

28143043 is an equidigital number, since it uses as much as digits as its factorization.

28143043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30484.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 28143043 is about 5305.0016965125. The cubic root of 28143043 is about 304.1751176818.

The spelling of 28143043 in words is "twenty-eight million, one hundred forty-three thousand, forty-three".