28340911 has 2 divisors, whose sum is σ = 28340912. Its totient is φ = 28340910.

The previous prime is 28340861. The next prime is 28340929. The reversal of 28340911 is 11904382.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28340911 - 2⁹ = 28340399 is a prime.

It is equal to p_1761373 and since 28340911 and 1761373 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 28340911.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28340111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14170455 + 14170456.

It is an arithmetic number, because the mean of its divisors is an integer number (14170456).

Almost surely, 2^28340911 is an apocalyptic number.

28340911 is a deficient number, since it is larger than the sum of its proper divisors (1).

28340911 is an equidigital number, since it uses as much as digits as its factorization.

28340911 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 28340911 is about 5323.6182244785. The cubic root of 28340911 is about 304.8863179302.

The spelling of 28340911 in words is "twenty-eight million, three hundred forty thousand, nine hundred eleven".