28263173 has 2 divisors, whose sum is σ = 28263174. Its totient is φ = 28263172.

The previous prime is 28263161. The next prime is 28263187. The reversal of 28263173 is 37136282.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19695844 + 8567329 = 4438^2 + 2927^2 .

It is a cyclic number.

It is not a de Polignac number, because 28263173 - 2¹⁰ = 28262149 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28269173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14131586 + 14131587.

It is an arithmetic number, because the mean of its divisors is an integer number (14131587).

Almost surely, 2^28263173 is an apocalyptic number.

It is an amenable number.

28263173 is a deficient number, since it is larger than the sum of its proper divisors (1).

28263173 is an equidigital number, since it uses as much as digits as its factorization.

28263173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 32.

The square root of 28263173 is about 5316.3119735396. The cubic root of 28263173 is about 304.6072989506.

The spelling of 28263173 in words is "twenty-eight million, two hundred sixty-three thousand, one hundred seventy-three".