206641630 has 32 divisors (see below), whose sum is σ = 424134144. Its totient is φ = 71809536.

The previous prime is 206641609. The next prime is 206641639. The reversal of 206641630 is 36146602.

206641630 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206641639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44542 + ... + 48961.

It is an arithmetic number, because the mean of its divisors is an integer number (13254192).

Almost surely, 2^206641630 is an apocalyptic number.

206641630 is an abundant number, since it is smaller than the sum of its proper divisors (217492514).

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

206641630 is a wasteful number, since it uses less digits than its factorization.

206641630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93540.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 206641630 is about 14375.0349564792. The cubic root of 206641630 is about 591.2065989981.

The spelling of 206641630 in words is "two hundred six million, six hundred forty-one thousand, six hundred thirty".