28288573 has 2 divisors, whose sum is σ = 28288574. Its totient is φ = 28288572.

The previous prime is 28288571. The next prime is 28288577. The reversal of 28288573 is 37588282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27436644 + 851929 = 5238^2 + 923^2 .

It is a cyclic number.

It is not a de Polignac number, because 28288573 - 2¹ = 28288571 is a prime.

Together with 28288571, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28288571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14144286 + 14144287.

It is an arithmetic number, because the mean of its divisors is an integer number (14144287).

Almost surely, 2^28288573 is an apocalyptic number.

It is an amenable number.

28288573 is a deficient number, since it is larger than the sum of its proper divisors (1).

28288573 is an equidigital number, since it uses as much as digits as its factorization.

28288573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 215040, while the sum is 43.

The square root of 28288573 is about 5318.7003111663. The cubic root of 28288573 is about 304.6985214142.

The spelling of 28288573 in words is "twenty-eight million, two hundred eighty-eight thousand, five hundred seventy-three".