28228573 has 2 divisors, whose sum is σ = 28228574. Its totient is φ = 28228572.

The previous prime is 28228553. The next prime is 28228621. The reversal of 28228573 is 37582282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14884164 + 13344409 = 3858^2 + 3653^2 .

It is a cyclic number.

It is not a de Polignac number, because 28228573 - 2²¹ = 26131421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28228523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14114286 + 14114287.

It is an arithmetic number, because the mean of its divisors is an integer number (14114287).

Almost surely, 2^28228573 is an apocalyptic number.

It is an amenable number.

28228573 is a deficient number, since it is larger than the sum of its proper divisors (1).

28228573 is an equidigital number, since it uses as much as digits as its factorization.

28228573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53760, while the sum is 37.

The square root of 28228573 is about 5313.0568414050. The cubic root of 28228573 is about 304.4829473043.

The spelling of 28228573 in words is "twenty-eight million, two hundred twenty-eight thousand, five hundred seventy-three".