28149911 has 2 divisors, whose sum is σ = 28149912. Its totient is φ = 28149910.

The previous prime is 28149883. The next prime is 28149941. The reversal of 28149911 is 11994182.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28149911 - 2¹⁴ = 28133527 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28149941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14074955 + 14074956.

It is an arithmetic number, because the mean of its divisors is an integer number (14074956).

Almost surely, 2^28149911 is an apocalyptic number.

28149911 is a deficient number, since it is larger than the sum of its proper divisors (1).

28149911 is an equidigital number, since it uses as much as digits as its factorization.

28149911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 35.

The square root of 28149911 is about 5305.6489706727. The cubic root of 28149911 is about 304.1998591996.

The spelling of 28149911 in words is "twenty-eight million, one hundred forty-nine thousand, nine hundred eleven".