28684349 has 2 divisors, whose sum is σ = 28684350. Its totient is φ = 28684348.

The previous prime is 28684333. The next prime is 28684363. The reversal of 28684349 is 94348682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28281124 + 403225 = 5318^2 + 635^2 .

It is a cyclic number.

It is not a de Polignac number, because 28684349 - 2⁴ = 28684333 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 (28684309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14342174 + 14342175.

It is an arithmetic number, because the mean of its divisors is an integer number (14342175).

Almost surely, 2^28684349 is an apocalyptic number.

It is an amenable number.

28684349 is a deficient number, since it is larger than the sum of its proper divisors (1).

28684349 is an equidigital number, since it uses as much as digits as its factorization.

28684349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 331776, while the sum is 44.

The square root of 28684349 is about 5355.7771611597. Note that the first 3 decimals coincide. The cubic root of 28684349 is about 306.1129241330.

The spelling of 28684349 in words is "twenty-eight million, six hundred eighty-four thousand, three hundred forty-nine".