28249423 has 2 divisors, whose sum is σ = 28249424. Its totient is φ = 28249422.

The previous prime is 28249379. The next prime is 28249483. The reversal of 28249423 is 32494282.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28249423 - 2⁹ = 28248911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28249483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14124711 + 14124712.

It is an arithmetic number, because the mean of its divisors is an integer number (14124712).

Almost surely, 2^28249423 is an apocalyptic number.

28249423 is a deficient number, since it is larger than the sum of its proper divisors (1).

28249423 is an equidigital number, since it uses as much as digits as its factorization.

28249423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 34.

The square root of 28249423 is about 5315.0186264961. The cubic root of 28249423 is about 304.5578939086.

The spelling of 28249423 in words is "twenty-eight million, two hundred forty-nine thousand, four hundred twenty-three".