28630573 has 2 divisors, whose sum is σ = 28630574. Its totient is φ = 28630572.

The previous prime is 28630543. The next prime is 28630579. The reversal of 28630573 is 37503682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21650409 + 6980164 = 4653^2 + 2642^2 .

It is a cyclic number.

It is not a de Polignac number, because 28630573 - 2⁵ = 28630541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28630579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14315286 + 14315287.

It is an arithmetic number, because the mean of its divisors is an integer number (14315287).

Almost surely, 2^28630573 is an apocalyptic number.

It is an amenable number.

28630573 is a deficient number, since it is larger than the sum of its proper divisors (1).

28630573 is an equidigital number, since it uses as much as digits as its factorization.

28630573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 28630573 is about 5350.7544327880. The cubic root of 28630573 is about 305.9215093372.

The spelling of 28630573 in words is "twenty-eight million, six hundred thirty thousand, five hundred seventy-three".