28686023 has 2 divisors, whose sum is σ = 28686024. Its totient is φ = 28686022.

The previous prime is 28686011. The next prime is 28686041. The reversal of 28686023 is 32068682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28686023 - 2¹² = 28681927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28686223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14343011 + 14343012.

It is an arithmetic number, because the mean of its divisors is an integer number (14343012).

Almost surely, 2^28686023 is an apocalyptic number.

28686023 is a deficient number, since it is larger than the sum of its proper divisors (1).

28686023 is an equidigital number, since it uses as much as digits as its factorization.

28686023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 28686023 is about 5355.9334387201. The cubic root of 28686023 is about 306.1188788677.

The spelling of 28686023 in words is "twenty-eight million, six hundred eighty-six thousand, twenty-three".