204091236 has 72 divisors (see below), whose sum is σ = 566704320. Its totient is φ = 61642944.

The previous prime is 204091231. The next prime is 204091253. The reversal of 204091236 is 632190402.

204091236 is a `hidden beast` number, since 20 + 409 + 1 + 236 = 666.

It is a super-2 number, since 2×204091236² = 83306465224015392, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (204091231) 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 23 ways as a sum of consecutive naturals, for example, 9246 + ... + 22218.

Almost surely, 2^204091236 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 204091236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (283352160).

204091236 is an abundant number, since it is smaller than the sum of its proper divisors (362613084).

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

204091236 is a wasteful number, since it uses less digits than its factorization.

204091236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13025 (or 13020 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 204091236 is about 14286.0503989031. The cubic root of 204091236 is about 588.7642775825.

The spelling of 204091236 in words is "two hundred four million, ninety-one thousand, two hundred thirty-six".