205204040 has 16 divisors (see below), whose sum is σ = 461709180. Its totient is φ = 82081600.

The previous prime is 205204037. The next prime is 205204073. The reversal of 205204040 is 40402502.

It can be written as a sum of positive squares in 2 ways, for example, as 205005124 + 198916 = 14318^2 + 446^2 .

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, 2565011 + ... + 2565090.

Almost surely, 2^205204040 is an apocalyptic number.

205204040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205204040 is an abundant number, since it is smaller than the sum of its proper divisors (256505140).

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

205204040 is a wasteful number, since it uses less digits than its factorization.

205204040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5130112 (or 5130108 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 205204040 is about 14324.9446770310. The cubic root of 205204040 is about 589.8324143391.

Adding to 205204040 its reverse (40402502), we get a palindrome (245606542).

The spelling of 205204040 in words is "two hundred five million, two hundred four thousand, forty".