28967819 has 2 divisors, whose sum is σ = 28967820. Its totient is φ = 28967818.

The previous prime is 28967801. The next prime is 28967821. The reversal of 28967819 is 91876982.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28967819 is a prime.

It is a super-2 number, since 2×28967819² = 1678269075233522, which contains 22 as substring.

Together with 28967821, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28967119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14483909 + 14483910.

It is an arithmetic number, because the mean of its divisors is an integer number (14483910).

Almost surely, 2^28967819 is an apocalyptic number.

28967819 is a deficient number, since it is larger than the sum of its proper divisors (1).

28967819 is an equidigital number, since it uses as much as digits as its factorization.

28967819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 50.

The square root of 28967819 is about 5382.1760469163. The cubic root of 28967819 is about 307.1179965662.

The spelling of 28967819 in words is "twenty-eight million, nine hundred sixty-seven thousand, eight hundred nineteen".