206287385 has 8 divisors (see below), whose sum is σ = 248636736. Its totient is φ = 164302000.

The previous prime is 206287381. The next prime is 206287387. The reversal of 206287385 is 583782602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 206287385 - 2² = 206287381 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206287381) 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 in 7 ways as a sum of consecutive naturals, for example, 89741 + ... + 92010.

It is an arithmetic number, because the mean of its divisors is an integer number (31079592).

Almost surely, 2^206287385 is an apocalyptic number.

It is an amenable number.

206287385 is a deficient number, since it is larger than the sum of its proper divisors (42349351).

206287385 is a wasteful number, since it uses less digits than its factorization.

206287385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181983.

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 206287385 is about 14362.7081360028. The cubic root of 206287385 is about 590.8685713188.

The spelling of 206287385 in words is "two hundred six million, two hundred eighty-seven thousand, three hundred eighty-five".