28984223 has 2 divisors, whose sum is σ = 28984224. Its totient is φ = 28984222.

The previous prime is 28984187. The next prime is 28984229. The reversal of 28984223 is 32248982.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28984223 - 2⁶ = 28984159 is a prime.

It is equal to p_1798751 and since 28984223 and 1798751 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28984229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14492111 + 14492112.

It is an arithmetic number, because the mean of its divisors is an integer number (14492112).

Almost surely, 2^28984223 is an apocalyptic number.

28984223 is a deficient number, since it is larger than the sum of its proper divisors (1).

28984223 is an equidigital number, since it uses as much as digits as its factorization.

28984223 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 28984223 is about 5383.6997501718. The cubic root of 28984223 is about 307.1759575854.

The spelling of 28984223 in words is "twenty-eight million, nine hundred eighty-four thousand, two hundred twenty-three".