28830559 has 4 divisors (see below), whose sum is σ = 28877904. Its totient is φ = 28783216.

The previous prime is 28830539. The next prime is 28830563. The reversal of 28830559 is 95503882.

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 28830559 - 2¹¹ = 28828511 is a prime.

It is a super-2 number, since 2×28830559² = 1662402264504962, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) 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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (28830509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22747 + ... + 23980.

It is an arithmetic number, because the mean of its divisors is an integer number (7219476).

Almost surely, 2^28830559 is an apocalyptic number.

28830559 is a deficient number, since it is larger than the sum of its proper divisors (47345).

28830559 is an equidigital number, since it uses as much as digits as its factorization.

28830559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47344.

The product of its (nonzero) digits is 86400, while the sum is 40.

The square root of 28830559 is about 5369.4095578564. The cubic root of 28830559 is about 306.6321496805.

The spelling of 28830559 in words is "twenty-eight million, eight hundred thirty thousand, five hundred fifty-nine".