204020240 has 20 divisors (see below), whose sum is σ = 474347244. Its totient is φ = 81608064.

The previous prime is 204020153. The next prime is 204020261. The reversal of 204020240 is 42020402.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 143616256 + 60403984 = 11984^2 + 7772^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1275047 + ... + 1275206.

Almost surely, 2^204020240 is an apocalyptic number.

204020240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204020240 is an abundant number, since it is smaller than the sum of its proper divisors (270327004).

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

204020240 is a wasteful number, since it uses less digits than its factorization.

204020240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2550266 (or 2550260 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 204020240 is about 14283.5653812345. The cubic root of 204020240 is about 588.6959996932.

Adding to 204020240 its reverse (42020402), we get a palindrome (246040642).

The spelling of 204020240 in words is "two hundred four million, twenty thousand, two hundred forty".