28678543 has 8 divisors (see below), whose sum is σ = 30700800. Its totient is φ = 26707608.

The previous prime is 28678537. The next prime is 28678567. The reversal of 28678543 is 34587682.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28678543 - 2⁵ = 28678511 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28678543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28678513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11671 + ... + 13912.

It is an arithmetic number, because the mean of its divisors is an integer number (3837600).

Almost surely, 2^28678543 is an apocalyptic number.

28678543 is a deficient number, since it is larger than the sum of its proper divisors (2022257).

28678543 is a wasteful number, since it uses less digits than its factorization.

28678543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25661.

The product of its digits is 322560, while the sum is 43.

The square root of 28678543 is about 5355.2351022154. The cubic root of 28678543 is about 306.0922692971.

The spelling of 28678543 in words is "twenty-eight million, six hundred seventy-eight thousand, five hundred forty-three".