28335139 has 8 divisors (see below), whose sum is σ = 32514048. Its totient is φ = 24189000.

The previous prime is 28335113. The next prime is 28335157. The reversal of 28335139 is 93153382.

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 28335139 - 2⁹ = 28334627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28335539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6307 + ... + 9820.

It is an arithmetic number, because the mean of its divisors is an integer number (4064256).

Almost surely, 2^28335139 is an apocalyptic number.

28335139 is a deficient number, since it is larger than the sum of its proper divisors (4178909).

28335139 is a wasteful number, since it uses less digits than its factorization.

28335139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16385.

The product of its digits is 19440, while the sum is 34.

The square root of 28335139 is about 5323.0760843708. The cubic root of 28335139 is about 304.8656184861.

The spelling of 28335139 in words is "twenty-eight million, three hundred thirty-five thousand, one hundred thirty-nine".