28386047 has 2 divisors, whose sum is σ = 28386048. Its totient is φ = 28386046.

The previous prime is 28386031. The next prime is 28386077. The reversal of 28386047 is 74068382.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28386047 - 2⁴ = 28386031 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28386047.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28386077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14193023 + 14193024.

It is an arithmetic number, because the mean of its divisors is an integer number (14193024).

Almost surely, 2^28386047 is an apocalyptic number.

28386047 is a deficient number, since it is larger than the sum of its proper divisors (1).

28386047 is an equidigital number, since it uses as much as digits as its factorization.

28386047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 28386047 is about 5327.8557600596. The cubic root of 28386047 is about 305.0480870163.

The spelling of 28386047 in words is "twenty-eight million, three hundred eighty-six thousand, forty-seven".