204854985 has 36 divisors (see below), whose sum is σ = 367816332. Its totient is φ = 105469056.

The previous prime is 204854971. The next prime is 204854987. The reversal of 204854985 is 589458402.

204854985 is a `hidden beast` number, since 20 + 4 + 8 + 549 + 85 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 7817616 + 197037369 = 2796^2 + 14037^2 .

It is not a de Polignac number, because 204854985 - 2⁵ = 204854953 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 204854985.

It is not an unprimeable number, because it can be changed into a prime (204854987) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 35139 + ... + 40551.

Almost surely, 2^204854985 is an apocalyptic number.

It is an amenable number.

204854985 is a deficient number, since it is larger than the sum of its proper divisors (162961347).

204854985 is a wasteful number, since it uses less digits than its factorization.

204854985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5482 (or 5450 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 45.

The square root of 204854985 is about 14312.7560239110. The cubic root of 204854985 is about 589.4977867476.

The spelling of 204854985 in words is "two hundred four million, eight hundred fifty-four thousand, nine hundred eighty-five".