204389394 has 32 divisors (see below), whose sum is σ = 447171840. Its totient is φ = 61765200.

The previous prime is 204389371. The next prime is 204389399. The reversal of 204389394 is 493983402.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (204389399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20929 + ... + 29099.

It is an arithmetic number, because the mean of its divisors is an integer number (13974120).

Almost surely, 2^204389394 is an apocalyptic number.

204389394 is an abundant number, since it is smaller than the sum of its proper divisors (242782446).

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

204389394 is a wasteful number, since it uses less digits than its factorization.

204389394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8566.

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 204389394 is about 14296.4818749229. The cubic root of 204389394 is about 589.0508477255.

The spelling of 204389394 in words is "two hundred four million, three hundred eighty-nine thousand, three hundred ninety-four".