204444404240 has 20 divisors (see below), whose sum is σ = 475333240044. Its totient is φ = 81777761664.

The previous prime is 204444404237. The next prime is 204444404249. The reversal of 204444404240 is 42404444402.

It can be written as a sum of positive squares in 2 ways, for example, as 150022979584 + 54421424656 = 387328^2 + 233284^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 204444404197 and 204444404206.

It is not an unprimeable number, because it can be changed into a prime (204444404249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1277777447 + ... + 1277777606.

Almost surely, 2^204444404240 is an apocalyptic number.

204444404240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204444404240 is an abundant number, since it is smaller than the sum of its proper divisors (270888835804).

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

204444404240 is a wasteful number, since it uses less digits than its factorization.

204444404240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2555555066 (or 2555555060 counting only the distinct ones).

The product of its (nonzero) digits is 65536, while the sum is 32.

Adding to 204444404240 its reverse (42404444402), we get a palindrome (246848848642).

It can be divided in two parts, 204 and 444404240, that added together give a palindrome (444404444).

The spelling of 204444404240 in words is "two hundred four billion, four hundred forty-four million, four hundred four thousand, two hundred forty".