28066339 has 4 divisors (see below), whose sum is σ = 32075824. Its totient is φ = 24056856.

The previous prime is 28066333. The next prime is 28066343. The reversal of 28066339 is 93366082.

It is a happy number.

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 28066339 - 2¹¹ = 28064291 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28066298 and 28066307.

It is not an unprimeable number, because it can be changed into a prime (28066333) 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, 2004732 + ... + 2004745.

It is an arithmetic number, because the mean of its divisors is an integer number (8018956).

Almost surely, 2^28066339 is an apocalyptic number.

28066339 is a deficient number, since it is larger than the sum of its proper divisors (4009485).

28066339 is an equidigital number, since it uses as much as digits as its factorization.

28066339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4009484.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 28066339 is about 5297.7673599357. The cubic root of 28066339 is about 303.8985226569.

The spelling of 28066339 in words is "twenty-eight million, sixty-six thousand, three hundred thirty-nine".