206438398 has 4 divisors (see below), whose sum is σ = 309657600. Its totient is φ = 103219198.

The previous prime is 206438389. The next prime is 206438447. The reversal of 206438398 is 893834602.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51609598 + ... + 51609601.

It is an arithmetic number, because the mean of its divisors is an integer number (77414400).

Almost surely, 2^206438398 is an apocalyptic number.

206438398 is a deficient number, since it is larger than the sum of its proper divisors (103219202).

206438398 is a wasteful number, since it uses less digits than its factorization.

206438398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103219201.

The product of its (nonzero) digits is 248832, while the sum is 43.

The square root of 206438398 is about 14367.9642956127. The cubic root of 206438398 is about 591.0127182347.

The spelling of 206438398 in words is "two hundred six million, four hundred thirty-eight thousand, three hundred ninety-eight".