204005560 has 32 divisors (see below), whose sum is σ = 500742000. Its totient is φ = 74183680.

The previous prime is 204005551. The next prime is 204005573. The reversal of 204005560 is 65500402.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231385 + ... + 232264.

Almost surely, 2^204005560 is an apocalyptic number.

204005560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204005560 is an abundant number, since it is smaller than the sum of its proper divisors (296736440).

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

204005560 is a wasteful number, since it uses less digits than its factorization.

204005560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463671 (or 463667 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 204005560 is about 14283.0514946912. The cubic root of 204005560 is about 588.6818797468.

Adding to 204005560 its reverse (65500402), we get a palindrome (269505962).

The spelling of 204005560 in words is "two hundred four million, five thousand, five hundred sixty".