206438426 has 8 divisors (see below), whose sum is σ = 309841524. Its totient is φ = 103157920.

The previous prime is 206438389. The next prime is 206438447. The reversal of 206438426 is 624834602.

It can be written as a sum of positive squares in 2 ways, for example, as 182925625 + 23512801 = 13525^2 + 4849^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26315 + ... + 33246.

Almost surely, 2^206438426 is an apocalyptic number.

206438426 is a deficient number, since it is larger than the sum of its proper divisors (103403098).

206438426 is a wasteful number, since it uses less digits than its factorization.

206438426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61296.

The product of its (nonzero) digits is 55296, while the sum is 35.

The square root of 206438426 is about 14367.9652700026. The cubic root of 206438426 is about 591.0127449551.

The spelling of 206438426 in words is "two hundred six million, four hundred thirty-eight thousand, four hundred twenty-six".