28387423 has 2 divisors, whose sum is σ = 28387424. Its totient is φ = 28387422.

The previous prime is 28387409. The next prime is 28387441. The reversal of 28387423 is 32478382.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28387423 - 2⁵ = 28387391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28387523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14193711 + 14193712.

It is an arithmetic number, because the mean of its divisors is an integer number (14193712).

Almost surely, 2^28387423 is an apocalyptic number.

28387423 is a deficient number, since it is larger than the sum of its proper divisors (1).

28387423 is an equidigital number, since it uses as much as digits as its factorization.

28387423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 37.

The square root of 28387423 is about 5327.9848911197. The cubic root of 28387423 is about 305.0530159565.

The spelling of 28387423 in words is "twenty-eight million, three hundred eighty-seven thousand, four hundred twenty-three".