28667851 has 2 divisors, whose sum is σ = 28667852. Its totient is φ = 28667850.

The previous prime is 28667833. The next prime is 28667857. The reversal of 28667851 is 15876682.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28667851 - 2⁵ = 28667819 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28667798 and 28667807.

It is not a weakly prime, because it can be changed into another prime (28667857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14333925 + 14333926.

It is an arithmetic number, because the mean of its divisors is an integer number (14333926).

Almost surely, 2^28667851 is an apocalyptic number.

28667851 is a deficient number, since it is larger than the sum of its proper divisors (1).

28667851 is an equidigital number, since it uses as much as digits as its factorization.

28667851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280, while the sum is 43.

The square root of 28667851 is about 5354.2367336531. The cubic root of 28667851 is about 306.0542252288.

The spelling of 28667851 in words is "twenty-eight million, six hundred sixty-seven thousand, eight hundred fifty-one".