28175089 has 2 divisors, whose sum is σ = 28175090. Its totient is φ = 28175088.

The previous prime is 28175047. The next prime is 28175099. The reversal of 28175089 is 98057182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28174864 + 225 = 5308^2 + 15^2 .

It is a cyclic number.

It is not a de Polignac number, because 28175089 - 2¹⁵ = 28142321 is a prime.

It is not a weakly prime, because it can be changed into another prime (28175099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14087544 + 14087545.

It is an arithmetic number, because the mean of its divisors is an integer number (14087545).

Almost surely, 2^28175089 is an apocalyptic number.

It is an amenable number.

28175089 is a deficient number, since it is larger than the sum of its proper divisors (1).

28175089 is an equidigital number, since it uses as much as digits as its factorization.

28175089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 28175089 is about 5308.0211943812. The cubic root of 28175089 is about 304.2905268832.

The spelling of 28175089 in words is "twenty-eight million, one hundred seventy-five thousand, eighty-nine".