28530943 has 8 divisors (see below), whose sum is σ = 33658880. Its totient is φ = 23666040.

The previous prime is 28530937. The next prime is 28530961. The reversal of 28530943 is 34903582.

It is a happy number.

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 28530943 - 2⁵ = 28530911 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28530899 and 28530908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28530043) 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 7 ways as a sum of consecutive naturals, for example, 65523 + ... + 65956.

It is an arithmetic number, because the mean of its divisors is an integer number (4207360).

Almost surely, 2^28530943 is an apocalyptic number.

28530943 is a deficient number, since it is larger than the sum of its proper divisors (5127937).

28530943 is a wasteful number, since it uses less digits than its factorization.

28530943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131517.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 28530943 is about 5341.4364172945. The cubic root of 28530943 is about 305.5662436274.

The spelling of 28530943 in words is "twenty-eight million, five hundred thirty thousand, nine hundred forty-three".