204606220 has 144 divisors (see below), whose sum is σ = 563209920. Its totient is φ = 60788736.

The previous prime is 204606217. The next prime is 204606221. The reversal of 204606220 is 22606402.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 204606191 and 204606200.

It is not an unprimeable number, because it can be changed into a prime (204606221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 525786 + ... + 526174.

It is an arithmetic number, because the mean of its divisors is an integer number (3911180).

Almost surely, 2^204606220 is an apocalyptic number.

204606220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 204606220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (281604960).

204606220 is an abundant number, since it is smaller than the sum of its proper divisors (358603700).

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

204606220 is a wasteful number, since it uses less digits than its factorization.

204606220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452 (or 433 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 204606220 is about 14304.0630591451. The cubic root of 204606220 is about 589.2590718393.

The spelling of 204606220 in words is "two hundred four million, six hundred six thousand, two hundred twenty".