204604640 has 24 divisors (see below), whose sum is σ = 483378840. Its totient is φ = 81841792.

The previous prime is 204604633. The next prime is 204604649. The reversal of 204604640 is 46406402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204604649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 639230 + ... + 639549.

It is an arithmetic number, because the mean of its divisors is an integer number (20140785).

Almost surely, 2^204604640 is an apocalyptic number.

204604640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204604640 is an abundant number, since it is smaller than the sum of its proper divisors (278774200).

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

204604640 is a wasteful number, since it uses less digits than its factorization.

204604640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1278794 (or 1278786 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 204604640 is about 14304.0078299755. The cubic root of 204604640 is about 589.2575550530.

The spelling of 204604640 in words is "two hundred four million, six hundred four thousand, six hundred forty".