204420660 has 48 divisors (see below), whose sum is σ = 573220032. Its totient is φ = 54432000.

The previous prime is 204420649. The next prime is 204420661. The reversal of 204420660 is 66024402.

204420660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 204420660.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204420661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46560 + ... + 50760.

It is an arithmetic number, because the mean of its divisors is an integer number (11942084).

Almost surely, 2^204420660 is an apocalyptic number.

204420660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204420660 is an abundant number, since it is smaller than the sum of its proper divisors (368799372).

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

204420660 is a wasteful number, since it uses less digits than its factorization.

204420660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5024 (or 5022 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 204420660 is about 14297.5753189133. The cubic root of 204420660 is about 589.0808824293.

The spelling of 204420660 in words is "two hundred four million, four hundred twenty thousand, six hundred sixty".