206640112 has 80 divisors (see below), whose sum is σ = 473755392. Its totient is φ = 85478400.

The previous prime is 206640101. The next prime is 206640139. The reversal of 206640112 is 211046602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 515112 + ... + 515512.

Almost surely, 2^206640112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206640112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236877696).

206640112 is an abundant number, since it is smaller than the sum of its proper divisors (267115280).

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

206640112 is a wasteful number, since it uses less digits than its factorization.

206640112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566 (or 560 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 206640112 is about 14374.9821565107. The cubic root of 206640112 is about 591.2051513166.

Adding to 206640112 its reverse (211046602), we get a palindrome (417686714).

The spelling of 206640112 in words is "two hundred six million, six hundred forty thousand, one hundred twelve".