28306541 has 2 divisors, whose sum is σ = 28306542. Its totient is φ = 28306540.

The previous prime is 28306519. The next prime is 28306571. The reversal of 28306541 is 14560382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21436900 + 6869641 = 4630^2 + 2621^2 .

It is a cyclic number.

It is not a de Polignac number, because 28306541 - 2¹⁰ = 28305517 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28306511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14153270 + 14153271.

It is an arithmetic number, because the mean of its divisors is an integer number (14153271).

Almost surely, 2^28306541 is an apocalyptic number.

It is an amenable number.

28306541 is a deficient number, since it is larger than the sum of its proper divisors (1).

28306541 is an equidigital number, since it uses as much as digits as its factorization.

28306541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 28306541 is about 5320.3891774944. The cubic root of 28306541 is about 304.7630193571.

The spelling of 28306541 in words is "twenty-eight million, three hundred six thousand, five hundred forty-one".