28386117 has 12 divisors (see below), whose sum is σ = 42785184. Its totient is φ = 18101160.

The previous prime is 28386109. The next prime is 28386121. The reversal of 28386117 is 71168382.

28386117 is a `hidden beast` number, since 2 + 8 + 38 + 611 + 7 = 666.

It is not a de Polignac number, because 28386117 - 2³ = 28386109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28386187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68359 + ... + 68772.

It is an arithmetic number, because the mean of its divisors is an integer number (3565432).

Almost surely, 2^28386117 is an apocalyptic number.

It is an amenable number.

28386117 is a deficient number, since it is larger than the sum of its proper divisors (14399067).

28386117 is a wasteful number, since it uses less digits than its factorization.

28386117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137160 (or 137157 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 28386117 is about 5327.8623293024. The cubic root of 28386117 is about 305.0483377657.

The spelling of 28386117 in words is "twenty-eight million, three hundred eighty-six thousand, one hundred seventeen".