28608473 has 2 divisors, whose sum is σ = 28608474. Its totient is φ = 28608472.

The previous prime is 28608457. The next prime is 28608493. The reversal of 28608473 is 37480682.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26337424 + 2271049 = 5132^2 + 1507^2 .

It is a cyclic number.

It is not a de Polignac number, because 28608473 - 2⁴ = 28608457 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (28608403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14304236 + 14304237.

It is an arithmetic number, because the mean of its divisors is an integer number (14304237).

Almost surely, 2^28608473 is an apocalyptic number.

It is an amenable number.

28608473 is a deficient number, since it is larger than the sum of its proper divisors (1).

28608473 is an equidigital number, since it uses as much as digits as its factorization.

28608473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 28608473 is about 5348.6889047691. The cubic root of 28608473 is about 305.8427752548.

The spelling of 28608473 in words is "twenty-eight million, six hundred eight thousand, four hundred seventy-three".