28315241 has 2 divisors, whose sum is σ = 28315242. Its totient is φ = 28315240.

The previous prime is 28315237. The next prime is 28315247. The reversal of 28315241 is 14251382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21576025 + 6739216 = 4645^2 + 2596^2 .

It is a cyclic number.

It is not a de Polignac number, because 28315241 - 2² = 28315237 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28315241.

It is not a weakly prime, because it can be changed into another prime (28315247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14157620 + 14157621.

It is an arithmetic number, because the mean of its divisors is an integer number (14157621).

Almost surely, 2^28315241 is an apocalyptic number.

It is an amenable number.

28315241 is a deficient number, since it is larger than the sum of its proper divisors (1).

28315241 is an equidigital number, since it uses as much as digits as its factorization.

28315241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1920, while the sum is 26.

The square root of 28315241 is about 5321.2067240430. The cubic root of 28315241 is about 304.7942390750.

The spelling of 28315241 in words is "twenty-eight million, three hundred fifteen thousand, two hundred forty-one".