28538023 has 2 divisors, whose sum is σ = 28538024. Its totient is φ = 28538022.

The previous prime is 28538021. The next prime is 28538033. The reversal of 28538023 is 32083582.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28538023 - 2¹ = 28538021 is a prime.

Together with 28538021, it forms a pair of twin primes.

It is equal to p_1772833 and since 28538023 and 1772833 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28538021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14269011 + 14269012.

It is an arithmetic number, because the mean of its divisors is an integer number (14269012).

Almost surely, 2^28538023 is an apocalyptic number.

28538023 is a deficient number, since it is larger than the sum of its proper divisors (1).

28538023 is an equidigital number, since it uses as much as digits as its factorization.

28538023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 28538023 is about 5342.0991192601. The cubic root of 28538023 is about 305.5915171240.

The spelling of 28538023 in words is "twenty-eight million, five hundred thirty-eight thousand, twenty-three".