28568339 has 4 divisors (see below), whose sum is σ = 29176224. Its totient is φ = 27960456.

The previous prime is 28568327. The next prime is 28568359. The reversal of 28568339 is 93386582.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93386582 = 2 ⋅46693291.

It is a cyclic number.

It is not a de Polignac number, because 28568339 - 2⁸ = 28568083 is a prime.

It is a super-2 number, since 2×28568339² = 1632299986437842, which contains 22 as substring.

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 28568339.

It is not an unprimeable number, because it can be changed into a prime (28568359) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 303872 + ... + 303965.

It is an arithmetic number, because the mean of its divisors is an integer number (7294056).

Almost surely, 2^28568339 is an apocalyptic number.

28568339 is a deficient number, since it is larger than the sum of its proper divisors (607885).

28568339 is an equidigital number, since it uses as much as digits as its factorization.

28568339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607884.

The product of its digits is 311040, while the sum is 44.

The square root of 28568339 is about 5344.9358274913. The cubic root of 28568339 is about 305.6996889932.

The spelling of 28568339 in words is "twenty-eight million, five hundred sixty-eight thousand, three hundred thirty-nine".