204140440 has 32 divisors (see below), whose sum is σ = 524933280. Its totient is φ = 69990912.

The previous prime is 204140429. The next prime is 204140441. The reversal of 204140440 is 44041402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204140441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 364257 + ... + 364816.

It is an arithmetic number, because the mean of its divisors is an integer number (16404165).

Almost surely, 2^204140440 is an apocalyptic number.

204140440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204140440 is an abundant number, since it is smaller than the sum of its proper divisors (320792840).

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

204140440 is a wasteful number, since it uses less digits than its factorization.

204140440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729091 (or 729087 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 204140440 is about 14287.7723946037. The cubic root of 204140440 is about 588.8115884982.

Adding to 204140440 its reverse (44041402), we get a palindrome (248181842).

The spelling of 204140440 in words is "two hundred four million, one hundred forty thousand, four hundred forty".