204004000 has 48 divisors (see below), whose sum is σ = 501247656. Its totient is φ = 81600000.

The previous prime is 204003983. The next prime is 204004001. The reversal of 204004000 is 400402.

It can be written as a sum of positive squares in 4 ways, for example, as 92236816 + 111767184 = 9604^2 + 10572^2 .

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

It is not an unprimeable number, because it can be changed into a prime (204004001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21501 + ... + 29500.

Almost surely, 2^204004000 is an apocalyptic number.

204004000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204004000 is an abundant number, since it is smaller than the sum of its proper divisors (297243656).

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

204004000 is an equidigital number, since it uses as much as digits as its factorization.

204004000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51026 (or 51008 counting only the distinct ones).

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

The square root of 204004000 is about 14282.9968844077. The cubic root of 204004000 is about 588.6803792222.

Adding to 204004000 its reverse (400402), we get a palindrome (204404402).

The spelling of 204004000 in words is "two hundred four million, four thousand".