28784167 has 2 divisors, whose sum is σ = 28784168. Its totient is φ = 28784166.

The previous prime is 28784159. The next prime is 28784207. The reversal of 28784167 is 76148782.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28784167 - 2³ = 28784159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28784117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14392083 + 14392084.

It is an arithmetic number, because the mean of its divisors is an integer number (14392084).

Almost surely, 2^28784167 is an apocalyptic number.

28784167 is a deficient number, since it is larger than the sum of its proper divisors (1).

28784167 is an equidigital number, since it uses as much as digits as its factorization.

28784167 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 150528, while the sum is 43.

The square root of 28784167 is about 5365.0877905212. The cubic root of 28784167 is about 306.4675914698.

The spelling of 28784167 in words is "twenty-eight million, seven hundred eighty-four thousand, one hundred sixty-seven".