28530543 has 16 divisors (see below), whose sum is σ = 39518336. Its totient is φ = 18295200.

The previous prime is 28530521. The next prime is 28530563. The reversal of 28530543 is 34503582.

It is not a de Polignac number, because 28530543 - 2⁶ = 28530479 is a prime.

It is a super-3 number, since 3×28530543³ (a number of 23 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 28530543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28530563) 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 15 ways as a sum of consecutive naturals, for example, 6993 + ... + 10293.

It is an arithmetic number, because the mean of its divisors is an integer number (2469896).

Almost surely, 2^28530543 is an apocalyptic number.

28530543 is a deficient number, since it is larger than the sum of its proper divisors (10987793).

28530543 is a wasteful number, since it uses less digits than its factorization.

28530543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3414.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 28530543 is about 5341.3989740516. The cubic root of 28530543 is about 305.5648156214.

The spelling of 28530543 in words is "twenty-eight million, five hundred thirty thousand, five hundred forty-three".