204122340 has 72 divisors (see below), whose sum is σ = 635926200. Its totient is φ = 52959744.

The previous prime is 204122299. The next prime is 204122341. The reversal of 204122340 is 43221402.

204122340 is a `hidden beast` number, since 20 + 412 + 234 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 10188864 + 193933476 = 3192^2 + 13926^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (204122341) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8665 + ... + 21984.

Almost surely, 2^204122340 is an apocalyptic number.

204122340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204122340 is an abundant number, since it is smaller than the sum of its proper divisors (431803860).

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

204122340 is a wasteful number, since it uses less digits than its factorization.

204122340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30701 (or 30696 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 204122340 is about 14287.1389718166. The cubic root of 204122340 is about 588.7941857651.

Adding to 204122340 its reverse (43221402), we get a palindrome (247343742).

The spelling of 204122340 in words is "two hundred four million, one hundred twenty-two thousand, three hundred forty".