423840206 has 16 divisors (see below), whose sum is σ = 653704128. Its totient is φ = 205977600.

The previous prime is 423840203. The next prime is 423840223. The reversal of 423840206 is 602048324.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423840203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12686 + ... + 31758.

It is an arithmetic number, because the mean of its divisors is an integer number (40856508).

Almost surely, 2^423840206 is an apocalyptic number.

423840206 is a deficient number, since it is larger than the sum of its proper divisors (229863922).

423840206 is a wasteful number, since it uses less digits than its factorization.

423840206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19387.

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 423840206 is about 20587.3797749981. The cubic root of 423840206 is about 751.1627628968.

It can be divided in two parts, 4238 and 40206, that added together give a palindrome (44444).

The spelling of 423840206 in words is "four hundred twenty-three million, eight hundred forty thousand, two hundred six".