204111400 has 24 divisors (see below), whose sum is σ = 474559470. Its totient is φ = 81644480.

The previous prime is 204111379. The next prime is 204111403. The reversal of 204111400 is 4111402.

It can be written as a sum of positive squares in 3 ways, for example, as 180472356 + 23639044 = 13434^2 + 4862^2 .

It is a super-2 number, since 2×204111400² = 83322927219920000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (204111403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 510079 + ... + 510478.

Almost surely, 2^204111400 is an apocalyptic number.

204111400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204111400 is an abundant number, since it is smaller than the sum of its proper divisors (270448070).

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

204111400 is a wasteful number, since it uses less digits than its factorization.

204111400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020573 (or 1020564 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 204111400 is about 14286.7561048686. The cubic root of 204111400 is about 588.7836667083.

Adding to 204111400 its reverse (4111402), we get a palindrome (208222802).

The spelling of 204111400 in words is "two hundred four million, one hundred eleven thousand, four hundred".