206405234 has 32 divisors (see below), whose sum is σ = 365904000. Its totient is φ = 85484160.

The previous prime is 206405207. The next prime is 206405239. The reversal of 206405234 is 432504602.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (206405239) 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, 60917 + ... + 64215.

It is an arithmetic number, because the mean of its divisors is an integer number (11434500).

Almost surely, 2^206405234 is an apocalyptic number.

206405234 is a deficient number, since it is larger than the sum of its proper divisors (159498766).

206405234 is a wasteful number, since it uses less digits than its factorization.

206405234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3458.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 206405234 is about 14366.8101539625. The cubic root of 206405234 is about 590.9810681224.

Adding to 206405234 its reverse (432504602), we get a palindrome (638909836).

The spelling of 206405234 in words is "two hundred six million, four hundred five thousand, two hundred thirty-four".