204603640 has 32 divisors (see below), whose sum is σ = 463034880. Its totient is φ = 81365632.

The previous prime is 204603587. The next prime is 204603649. The reversal of 204603640 is 46306402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204603649) 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, 7864 + ... + 21703.

It is an arithmetic number, because the mean of its divisors is an integer number (14469840).

Almost surely, 2^204603640 is an apocalyptic number.

204603640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204603640 is an abundant number, since it is smaller than the sum of its proper divisors (258431240).

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

204603640 is a wasteful number, since it uses less digits than its factorization.

204603640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29751 (or 29747 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 204603640 is about 14303.9728746946. The cubic root of 204603640 is about 589.2565950577.

The spelling of 204603640 in words is "two hundred four million, six hundred three thousand, six hundred forty".