28184887 has 2 divisors, whose sum is σ = 28184888. Its totient is φ = 28184886.

The previous prime is 28184881. The next prime is 28184899. The reversal of 28184887 is 78848182.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28184887 - 2³ = 28184879 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 (28184881) 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, 14092443 + 14092444.

It is an arithmetic number, because the mean of its divisors is an integer number (14092444).

Almost surely, 2^28184887 is an apocalyptic number.

28184887 is a deficient number, since it is larger than the sum of its proper divisors (1).

28184887 is an equidigital number, since it uses as much as digits as its factorization.

28184887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 229376, while the sum is 46.

The square root of 28184887 is about 5308.9440569665. The cubic root of 28184887 is about 304.3257955449.

The spelling of 28184887 in words is "twenty-eight million, one hundred eighty-four thousand, eight hundred eighty-seven".