28298339 has 4 divisors (see below), whose sum is σ = 28390824. Its totient is φ = 28205856.

The previous prime is 28298311. The next prime is 28298341. The reversal of 28298339 is 93389282.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28298339 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28298339.

It is not an unprimeable number, because it can be changed into a prime (28298359) 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, 45782 + ... + 46395.

It is an arithmetic number, because the mean of its divisors is an integer number (7097706).

Almost surely, 2^28298339 is an apocalyptic number.

28298339 is a deficient number, since it is larger than the sum of its proper divisors (92485).

28298339 is an equidigital number, since it uses as much as digits as its factorization.

28298339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92484.

The product of its digits is 186624, while the sum is 44.

The square root of 28298339 is about 5319.6183133755. The cubic root of 28298339 is about 304.7335808402.

The spelling of 28298339 in words is "twenty-eight million, two hundred ninety-eight thousand, three hundred thirty-nine".