206438404 has 12 divisors (see below), whose sum is σ = 367390800. Its totient is φ = 101469608.

The previous prime is 206438389. The next prime is 206438447. The reversal of 206438404 is 404834602.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 437134 + ... + 437605.

It is an arithmetic number, because the mean of its divisors is an integer number (30615900).

Almost surely, 2^206438404 is an apocalyptic number.

It is an amenable number.

206438404 is a deficient number, since it is larger than the sum of its proper divisors (160952396).

206438404 is a wasteful number, since it uses less digits than its factorization.

206438404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874802 (or 874800 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 31.

The square root of 206438404 is about 14367.9645044105. The cubic root of 206438404 is about 591.0127239605.

The spelling of 206438404 in words is "two hundred six million, four hundred thirty-eight thousand, four hundred four".