204559940 has 36 divisors (see below), whose sum is σ = 463142316. Its totient is φ = 75444672.

The previous prime is 204559937. The next prime is 204559951. The reversal of 204559940 is 49955402.

204559940 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 50353216 + 154206724 = 7096^2 + 12418^2 .

It is a junction number, because it is equal to n+sod(n) for n = 204559894 and 204559903.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 230177 + ... + 231063.

Almost surely, 2^204559940 is an apocalyptic number.

204559940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204559940 is an abundant number, since it is smaller than the sum of its proper divisors (258582376).

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

204559940 is an equidigital number, since it uses as much as digits as its factorization.

204559940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1796 (or 907 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 204559940 is about 14302.4452454816. The cubic root of 204559940 is about 589.2146402050.

The spelling of 204559940 in words is "two hundred four million, five hundred fifty-nine thousand, nine hundred forty".