28232173 has 2 divisors, whose sum is σ = 28232174. Its totient is φ = 28232172.

The previous prime is 28232161. The next prime is 28232179. The reversal of 28232173 is 37123282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22486564 + 5745609 = 4742^2 + 2397^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28232173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28232179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14116086 + 14116087.

It is an arithmetic number, because the mean of its divisors is an integer number (14116087).

Almost surely, 2^28232173 is an apocalyptic number.

It is an amenable number.

28232173 is a deficient number, since it is larger than the sum of its proper divisors (1).

28232173 is an equidigital number, since it uses as much as digits as its factorization.

28232173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 28.

The square root of 28232173 is about 5313.3956186228. The cubic root of 28232173 is about 304.4958903604.

The spelling of 28232173 in words is "twenty-eight million, two hundred thirty-two thousand, one hundred seventy-three".