204194688 has 64 divisors (see below), whose sum is σ = 544598400. Its totient is φ = 67788288.

The previous prime is 204194681. The next prime is 204194707. The reversal of 204194688 is 886491402.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204194681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107733 + ... + 109611.

It is an arithmetic number, because the mean of its divisors is an integer number (8509350).

Almost surely, 2^204194688 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 204194688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272299200).

204194688 is an abundant number, since it is smaller than the sum of its proper divisors (340403712).

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

204194688 is a wasteful number, since it uses less digits than its factorization.

204194688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2179 (or 2167 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 204194688 is about 14289.6706750016. The cubic root of 204194688 is about 588.8637405397.

The spelling of 204194688 in words is "two hundred four million, one hundred ninety-four thousand, six hundred eighty-eight".