204135400 has 96 divisors (see below), whose sum is σ = 546840000. Its totient is φ = 69419520.

The previous prime is 204135389. The next prime is 204135413. The reversal of 204135400 is 4531402.

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, 194076 + ... + 195124.

It is an arithmetic number, because the mean of its divisors is an integer number (5696250).

Almost surely, 2^204135400 is an apocalyptic number.

204135400 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 204135400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273420000).

204135400 is an abundant number, since it is smaller than the sum of its proper divisors (342704600).

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

204135400 is a wasteful number, since it uses less digits than its factorization.

204135400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1211 (or 1202 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 204135400 is about 14287.5960189249. The cubic root of 204135400 is about 588.8067427576.

Adding to 204135400 its reverse (4531402), we get a palindrome (208666802).

The spelling of 204135400 in words is "two hundred four million, one hundred thirty-five thousand, four hundred".