204400120 has 32 divisors (see below), whose sum is σ = 475761600. Its totient is φ = 78940288.

The previous prime is 204400117. The next prime is 204400121. The reversal of 204400120 is 21004402.

204400120 is nontrivially palindromic in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 204400120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204400121) 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, 86944 + ... + 89263.

It is an arithmetic number, because the mean of its divisors is an integer number (14867550).

Almost surely, 2^204400120 is an apocalyptic number.

204400120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204400120 is an abundant number, since it is smaller than the sum of its proper divisors (271361480).

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

204400120 is a wasteful number, since it uses less digits than its factorization.

204400120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176247 (or 176243 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 204400120 is about 14296.8569972564. The cubic root of 204400120 is about 589.0611516666.

Adding to 204400120 its reverse (21004402), we get a palindrome (225404522).

The spelling of 204400120 in words is "two hundred four million, four hundred thousand, one hundred twenty".