28422839 has 2 divisors, whose sum is σ = 28422840. Its totient is φ = 28422838.

The previous prime is 28422833. The next prime is 28422847. The reversal of 28422839 is 93822482.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28422839 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 (28422833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14211419 + 14211420.

It is an arithmetic number, because the mean of its divisors is an integer number (14211420).

Almost surely, 2^28422839 is an apocalyptic number.

28422839 is a deficient number, since it is larger than the sum of its proper divisors (1).

28422839 is an equidigital number, since it uses as much as digits as its factorization.

28422839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55296, while the sum is 38.

The square root of 28422839 is about 5331.3074381431. The cubic root of 28422839 is about 305.1798240835.

The spelling of 28422839 in words is "twenty-eight million, four hundred twenty-two thousand, eight hundred thirty-nine".