204403986 has 40 divisors (see below), whose sum is σ = 463195260. Its totient is φ = 67364352.

The previous prime is 204403963. The next prime is 204403999. The reversal of 204403986 is 689304402.

It is a happy number.

204403986 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 196868961 + 7535025 = 14031^2 + 2745^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 204403986.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7330 + ... + 21506.

Almost surely, 2^204403986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 204403986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (231597630).

204403986 is an abundant number, since it is smaller than the sum of its proper divisors (258791274).

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

204403986 is a wasteful number, since it uses less digits than its factorization.

204403986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14280 (or 14271 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 204403986 is about 14296.9922011590. The cubic root of 204403986 is about 589.0648654545.

The spelling of 204403986 in words is "two hundred four million, four hundred three thousand, nine hundred eighty-six".