28804543 has 4 divisors (see below), whose sum is σ = 28845880. Its totient is φ = 28763208.

The previous prime is 28804481. The next prime is 28804547. The reversal of 28804543 is 34540882.

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

It is a cyclic number.

It is not a de Polignac number, because 28804543 - 2⁹ = 28804031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28804499 and 28804508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28804547) 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, 19605 + ... + 21022.

It is an arithmetic number, because the mean of its divisors is an integer number (7211470).

Almost surely, 2^28804543 is an apocalyptic number.

28804543 is a deficient number, since it is larger than the sum of its proper divisors (41337).

28804543 is an equidigital number, since it uses as much as digits as its factorization.

28804543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41336.

The product of its (nonzero) digits is 30720, while the sum is 34.

The square root of 28804543 is about 5366.9863983431. The cubic root of 28804543 is about 306.5398894422.

The spelling of 28804543 in words is "twenty-eight million, eight hundred four thousand, five hundred forty-three".