28339039 has 8 divisors (see below), whose sum is σ = 28622880. Its totient is φ = 28057056.

The previous prime is 28339037. The next prime is 28339067. The reversal of 28339039 is 93093382.

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 28339039 - 2¹ = 28339037 is a prime.

It is a super-2 number, since 2×28339039² = 1606202262887042, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28338989 and 28339007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28339033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72657 + ... + 73045.

It is an arithmetic number, because the mean of its divisors is an integer number (3577860).

Almost surely, 2^28339039 is an apocalyptic number.

28339039 is a deficient number, since it is larger than the sum of its proper divisors (283841).

28339039 is a wasteful number, since it uses less digits than its factorization.

28339039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929.

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 28339039 is about 5323.4424013039. The cubic root of 28339039 is about 304.8796049049.

The spelling of 28339039 in words is "twenty-eight million, three hundred thirty-nine thousand, thirty-nine".