28170533 has 2 divisors, whose sum is σ = 28170534. Its totient is φ = 28170532.

The previous prime is 28170529. The next prime is 28170539. The reversal of 28170533 is 33507182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27019204 + 1151329 = 5198^2 + 1073^2 .

It is a cyclic number.

It is not a de Polignac number, because 28170533 - 2² = 28170529 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 28170496 and 28170505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28170539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14085266 + 14085267.

It is an arithmetic number, because the mean of its divisors is an integer number (14085267).

Almost surely, 2^28170533 is an apocalyptic number.

It is an amenable number.

28170533 is a deficient number, since it is larger than the sum of its proper divisors (1).

28170533 is an equidigital number, since it uses as much as digits as its factorization.

28170533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 28170533 is about 5307.5920152174. The cubic root of 28170533 is about 304.2741244225.

The spelling of 28170533 in words is "twenty-eight million, one hundred seventy thousand, five hundred thirty-three".