28969427 has 2 divisors, whose sum is σ = 28969428. Its totient is φ = 28969426.

The previous prime is 28969403. The next prime is 28969453. The reversal of 28969427 is 72496982.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28969427 - 2⁶ = 28969363 is a prime.

It is equal to p_1797878 and since 28969427 and 1797878 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (28969477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14484713 + 14484714.

It is an arithmetic number, because the mean of its divisors is an integer number (14484714).

Almost surely, 2^28969427 is an apocalyptic number.

28969427 is a deficient number, since it is larger than the sum of its proper divisors (1).

28969427 is an equidigital number, since it uses as much as digits as its factorization.

28969427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 47.

The square root of 28969427 is about 5382.3254268021. The cubic root of 28969427 is about 307.1236791549.

The spelling of 28969427 in words is "twenty-eight million, nine hundred sixty-nine thousand, four hundred twenty-seven".