28300139 has 16 divisors (see below), whose sum is σ = 34195200. Its totient is φ = 22879584.

The previous prime is 28300133. The next prime is 28300141. The reversal of 28300139 is 93100382.

It is not a de Polignac number, because 28300139 - 2⁴ = 28300123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28300133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51464 + ... + 52010.

It is an arithmetic number, because the mean of its divisors is an integer number (2137200).

Almost surely, 2^28300139 is an apocalyptic number.

28300139 is a deficient number, since it is larger than the sum of its proper divisors (5895061).

28300139 is a wasteful number, since it uses less digits than its factorization.

28300139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 962.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 28300139 is about 5319.7874957558. The cubic root of 28300139 is about 304.7400418650.

The spelling of 28300139 in words is "twenty-eight million, three hundred thousand, one hundred thirty-nine".