28343111 has 2 divisors, whose sum is σ = 28343112. Its totient is φ = 28343110.

The previous prime is 28343099. The next prime is 28343113. The reversal of 28343111 is 11134382.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28343111 - 2⁶ = 28343047 is a prime.

Together with 28343113, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28343113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14171555 + 14171556.

It is an arithmetic number, because the mean of its divisors is an integer number (14171556).

Almost surely, 2^28343111 is an apocalyptic number.

28343111 is a deficient number, since it is larger than the sum of its proper divisors (1).

28343111 is an equidigital number, since it uses as much as digits as its factorization.

28343111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 23.

The square root of 28343111 is about 5323.8248468559. The cubic root of 28343111 is about 304.8942067914.

Adding to 28343111 its reverse (11134382), we get a palindrome (39477493).

The spelling of 28343111 in words is "twenty-eight million, three hundred forty-three thousand, one hundred eleven".