28856339 has 2 divisors, whose sum is σ = 28856340. Its totient is φ = 28856338.

The previous prime is 28856323. The next prime is 28856371. The reversal of 28856339 is 93365882.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28856339 - 2⁴ = 28856323 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28856339.

It is not a weakly prime, because it can be changed into another prime (28856309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14428169 + 14428170.

It is an arithmetic number, because the mean of its divisors is an integer number (14428170).

Almost surely, 2^28856339 is an apocalyptic number.

28856339 is a deficient number, since it is larger than the sum of its proper divisors (1).

28856339 is an equidigital number, since it uses as much as digits as its factorization.

28856339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 44.

The square root of 28856339 is about 5371.8096578341. The cubic root of 28856339 is about 306.7235182616.

Adding to 28856339 its reverse (93365882), we get a palindrome (122222221).

The spelling of 28856339 in words is "twenty-eight million, eight hundred fifty-six thousand, three hundred thirty-nine".