204144340 has 72 divisors (see below), whose sum is σ = 454348440. Its totient is φ = 77016576.

The previous prime is 204144329. The next prime is 204144433. The reversal of 204144340 is 43441402.

It can be written as a sum of positive squares in 12 ways, for example, as 853776 + 203290564 = 924^2 + 14258^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 891346 + ... + 891574.

It is an arithmetic number, because the mean of its divisors is an integer number (6310395).

Almost surely, 2^204144340 is an apocalyptic number.

204144340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 204144340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (227174220).

204144340 is an abundant number, since it is smaller than the sum of its proper divisors (250204100).

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

204144340 is a wasteful number, since it uses less digits than its factorization.

204144340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349 (or 318 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 204144340 is about 14287.9088742895. The cubic root of 204144340 is about 588.8153381236.

Adding to 204144340 its reverse (43441402), we get a palindrome (247585742).

The spelling of 204144340 in words is "two hundred four million, one hundred forty-four thousand, three hundred forty".