28292189 has 2 divisors, whose sum is σ = 28292190. Its totient is φ = 28292188.

The previous prime is 28292183. The next prime is 28292207. The reversal of 28292189 is 98129282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26988025 + 1304164 = 5195^2 + 1142^2 .

It is a cyclic number.

It is not a de Polignac number, because 28292189 - 2²⁰ = 27243613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28292183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14146094 + 14146095.

It is an arithmetic number, because the mean of its divisors is an integer number (14146095).

Almost surely, 2^28292189 is an apocalyptic number.

It is an amenable number.

28292189 is a deficient number, since it is larger than the sum of its proper divisors (1).

28292189 is an equidigital number, since it uses as much as digits as its factorization.

28292189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 41.

The square root of 28292189 is about 5319.0402329744. The cubic root of 28292189 is about 304.7115036044.

The spelling of 28292189 in words is "twenty-eight million, two hundred ninety-two thousand, one hundred eighty-nine".