206305404 has 48 divisors (see below), whose sum is σ = 513773568. Its totient is φ = 64205568.

The previous prime is 206305361. The next prime is 206305427. The reversal of 206305404 is 404503602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21927 + ... + 29889.

It is an arithmetic number, because the mean of its divisors is an integer number (10703616).

Almost surely, 2^206305404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206305404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (256886784).

206305404 is an abundant number, since it is smaller than the sum of its proper divisors (307468164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

206305404 is a wasteful number, since it uses less digits than its factorization.

206305404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8114 (or 8112 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 206305404 is about 14363.3354065133. The cubic root of 206305404 is about 590.8857747472.

The spelling of 206305404 in words is "two hundred six million, three hundred five thousand, four hundred four".