204305406 has 32 divisors (see below), whose sum is σ = 423856800. Its totient is φ = 65573760.

The previous prime is 204305401. The next prime is 204305417. The reversal of 204305406 is 604503402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204305401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71860 + ... + 74648.

It is an arithmetic number, because the mean of its divisors is an integer number (13245525).

Almost surely, 2^204305406 is an apocalyptic number.

204305406 is an abundant number, since it is smaller than the sum of its proper divisors (219551394).

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

204305406 is a wasteful number, since it uses less digits than its factorization.

204305406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3244.

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

The square root of 204305406 is about 14293.5442070887. The cubic root of 204305406 is about 588.9701521151.

Adding to 204305406 its reverse (604503402), we get a palindrome (808808808).

The spelling of 204305406 in words is "two hundred four million, three hundred five thousand, four hundred six".