204400000 has 192 divisors, whose sum is σ = 589649760. Its totient is φ = 69120000.

The previous prime is 204399997. The next prime is 204400037. The reversal of 204400000 is 4402.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a self number, because there is not a number n which added to its sum of digits gives 204400000.

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, 2799964 + ... + 2800036.

Almost surely, 2^204400000 is an apocalyptic number.

204400000 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 204400000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (294824880).

204400000 is an abundant number, since it is smaller than the sum of its proper divisors (385249760).

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

204400000 is an frugal number, since it uses more digits than its factorization.

204400000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119 (or 87 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 10.

The square root of 204400000 is about 14296.8528005292. The cubic root of 204400000 is about 589.0610363905.

Adding to 204400000 its reverse (4402), we get a palindrome (204404402).

The spelling of 204400000 in words is "two hundred four million, four hundred thousand".