28339069 has 4 divisors (see below), whose sum is σ = 30915360. Its totient is φ = 25762780.

The previous prime is 28339067. The next prime is 28339081. The reversal of 28339069 is 96093382.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28339069 - 2¹ = 28339067 is a prime.

It is a super-2 number, since 2×28339069² = 1606205663573522, 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 (28339067) 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, 1288129 + ... + 1288150.

It is an arithmetic number, because the mean of its divisors is an integer number (7728840).

Almost surely, 2^28339069 is an apocalyptic number.

It is an amenable number.

28339069 is a deficient number, since it is larger than the sum of its proper divisors (2576291).

28339069 is a wasteful number, since it uses less digits than its factorization.

28339069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2576290.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 28339069 is about 5323.4452190287. The cubic root of 28339069 is about 304.8797124878.

The spelling of 28339069 in words is "twenty-eight million, three hundred thirty-nine thousand, sixty-nine".