206689086 has 48 divisors (see below), whose sum is σ = 468782496. Its totient is φ = 65691648.

The previous prime is 206689081. The next prime is 206689099. The reversal of 206689086 is 680986602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206689081) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 178686 + ... + 179838.

It is an arithmetic number, because the mean of its divisors is an integer number (9766302).

Almost surely, 2^206689086 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206689086, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (234391248).

206689086 is an abundant number, since it is smaller than the sum of its proper divisors (262093410).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

206689086 is a wasteful number, since it uses less digits than its factorization.

206689086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1617 (or 1614 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 206689086 is about 14376.6855011856. The cubic root of 206689086 is about 591.2518531141.

The spelling of 206689086 in words is "two hundred six million, six hundred eighty-nine thousand, eighty-six".