28504667 has 2 divisors, whose sum is σ = 28504668. Its totient is φ = 28504666.

The previous prime is 28504661. The next prime is 28504669. The reversal of 28504667 is 76640582.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28504667 - 2⁶ = 28504603 is a prime.

Together with 28504669, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_1770896 and since 28504667 and 1770896 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28504667.

It is not a weakly prime, because it can be changed into another prime (28504661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14252333 + 14252334.

It is an arithmetic number, because the mean of its divisors is an integer number (14252334).

Almost surely, 2^28504667 is an apocalyptic number.

28504667 is a deficient number, since it is larger than the sum of its proper divisors (1).

28504667 is an equidigital number, since it uses as much as digits as its factorization.

28504667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 28504667 is about 5338.9762127209. The cubic root of 28504667 is about 305.4724095434.

The spelling of 28504667 in words is "twenty-eight million, five hundred four thousand, six hundred sixty-seven".