28563043 has 4 divisors (see below), whose sum is σ = 30243240. Its totient is φ = 26882848.

The previous prime is 28563011. The next prime is 28563049. The reversal of 28563043 is 34036582.

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

It is not a de Polignac number, because 28563043 - 2⁵ = 28563011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28562996 and 28563014.

It is not an unprimeable number, because it can be changed into a prime (28563049) 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, 840073 + ... + 840106.

It is an arithmetic number, because the mean of its divisors is an integer number (7560810).

Almost surely, 2^28563043 is an apocalyptic number.

28563043 is a deficient number, since it is larger than the sum of its proper divisors (1680197).

28563043 is a wasteful number, since it uses less digits than its factorization.

28563043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1680196.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 28563043 is about 5344.4403823038. The cubic root of 28563043 is about 305.6807976183.

The spelling of 28563043 in words is "twenty-eight million, five hundred sixty-three thousand, forty-three".