206128285 has 8 divisors (see below), whose sum is σ = 269840736. Its totient is φ = 149911440.

The previous prime is 206128271. The next prime is 206128297. The reversal of 206128285 is 582821602.

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

It is not a de Polignac number, because 206128285 - 2⁵ = 206128253 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 206128285.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1873839 + ... + 1873948.

It is an arithmetic number, because the mean of its divisors is an integer number (33730092).

Almost surely, 2^206128285 is an apocalyptic number.

It is an amenable number.

206128285 is a deficient number, since it is larger than the sum of its proper divisors (63712451).

206128285 is a wasteful number, since it uses less digits than its factorization.

206128285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3747803.

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 206128285 is about 14357.1684185984. The cubic root of 206128285 is about 590.7166289725.

Adding to 206128285 its reverse (582821602), we get a palindrome (788949887).

The spelling of 206128285 in words is "two hundred six million, one hundred twenty-eight thousand, two hundred eighty-five".