28000541 has 2 divisors, whose sum is σ = 28000542. Its totient is φ = 28000540.

The previous prime is 28000507. The next prime is 28000543. The reversal of 28000541 is 14500082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14707225 + 13293316 = 3835^2 + 3646^2 .

It is a cyclic number.

It is not a de Polignac number, because 28000541 - 2⁶ = 28000477 is a prime.

It is a Sophie Germain prime.

Together with 28000543, it forms a pair of twin primes.

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 (28000543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14000270 + 14000271.

It is an arithmetic number, because the mean of its divisors is an integer number (14000271).

Almost surely, 2^28000541 is an apocalyptic number.

It is an amenable number.

28000541 is a deficient number, since it is larger than the sum of its proper divisors (1).

28000541 is an equidigital number, since it uses as much as digits as its factorization.

28000541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 28000541 is about 5291.5537415772. The cubic root of 28000541 is about 303.6608528829.

The spelling of 28000541 in words is "twenty-eight million, five hundred forty-one", and thus it is an aban number.