28161839 has 2 divisors, whose sum is σ = 28161840. Its totient is φ = 28161838.

The previous prime is 28161827. The next prime is 28161851. The reversal of 28161839 is 93816182.

It is a balanced prime because it is at equal distance from previous prime (28161827) and next prime (28161851).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28161839 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28161899) 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 as a sum of consecutive naturals, namely, 14080919 + 14080920.

It is an arithmetic number, because the mean of its divisors is an integer number (14080920).

Almost surely, 2^28161839 is an apocalyptic number.

28161839 is a deficient number, since it is larger than the sum of its proper divisors (1).

28161839 is an equidigital number, since it uses as much as digits as its factorization.

28161839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 38.

The square root of 28161839 is about 5306.7729365406. The cubic root of 28161839 is about 304.2428194720.

The spelling of 28161839 in words is "twenty-eight million, one hundred sixty-one thousand, eight hundred thirty-nine".