204406401 has 8 divisors (see below), whose sum is σ = 274214560. Its totient is φ = 135434592.

The previous prime is 204406393. The next prime is 204406403. The reversal of 204406401 is 104604402.

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

It is not a de Polignac number, because 204406401 - 2³ = 204406393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204406403) 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, 208516 + ... + 209493.

It is an arithmetic number, because the mean of its divisors is an integer number (34276820).

Almost surely, 2^204406401 is an apocalyptic number.

It is an amenable number.

204406401 is a deficient number, since it is larger than the sum of its proper divisors (69808159).

204406401 is a wasteful number, since it uses less digits than its factorization.

204406401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418175.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 204406401 is about 14297.0766592335. The cubic root of 204406401 is about 589.0671853474.

The spelling of 204406401 in words is "two hundred four million, four hundred six thousand, four hundred one".