28604549 has 2 divisors, whose sum is σ = 28604550. Its totient is φ = 28604548.

The previous prime is 28604507. The next prime is 28604567. The reversal of 28604549 is 94540682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21687649 + 6916900 = 4657^2 + 2630^2 .

It is a cyclic number.

It is not a de Polignac number, because 28604549 - 2²⁰ = 27555973 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 (28604579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14302274 + 14302275.

It is an arithmetic number, because the mean of its divisors is an integer number (14302275).

Almost surely, 2^28604549 is an apocalyptic number.

It is an amenable number.

28604549 is a deficient number, since it is larger than the sum of its proper divisors (1).

28604549 is an equidigital number, since it uses as much as digits as its factorization.

28604549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 28604549 is about 5348.3220733236. The cubic root of 28604549 is about 305.8287912634.

The spelling of 28604549 in words is "twenty-eight million, six hundred four thousand, five hundred forty-nine".