28243043 has 4 divisors (see below), whose sum is σ = 28630008. Its totient is φ = 27856080.

The previous prime is 28243021. The next prime is 28243049. The reversal of 28243043 is 34034282.

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-28243043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28243049) 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, 193373 + ... + 193518.

It is an arithmetic number, because the mean of its divisors is an integer number (7157502).

Almost surely, 2^28243043 is an apocalyptic number.

28243043 is a deficient number, since it is larger than the sum of its proper divisors (386965).

28243043 is an equidigital number, since it uses as much as digits as its factorization.

28243043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386964.

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 28243043 is about 5314.4184065615. The cubic root of 28243043 is about 304.5349645239.

The spelling of 28243043 in words is "twenty-eight million, two hundred forty-three thousand, forty-three".