28276349 has 2 divisors, whose sum is σ = 28276350. Its totient is φ = 28276348.

The previous prime is 28276343. The next prime is 28276387. The reversal of 28276349 is 94367282.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26265625 + 2010724 = 5125^2 + 1418^2 .

It is a cyclic number.

It is not a de Polignac number, because 28276349 - 2⁴ = 28276333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28276343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14138174 + 14138175.

It is an arithmetic number, because the mean of its divisors is an integer number (14138175).

Almost surely, 2^28276349 is an apocalyptic number.

It is an amenable number.

28276349 is a deficient number, since it is larger than the sum of its proper divisors (1).

28276349 is an equidigital number, since it uses as much as digits as its factorization.

28276349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 41.

The square root of 28276349 is about 5317.5510340757. The cubic root of 28276349 is about 304.6546265248.

The spelling of 28276349 in words is "twenty-eight million, two hundred seventy-six thousand, three hundred forty-nine".