204664560 has 40 divisors (see below), whose sum is σ = 634460880. Its totient is φ = 54577152.

The previous prime is 204664553. The next prime is 204664567. The reversal of 204664560 is 65466402.

It is an interprime number because it is at equal distance from previous prime (204664553) and next prime (204664567).

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204664567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 426145 + ... + 426624.

It is an arithmetic number, because the mean of its divisors is an integer number (15861522).

Almost surely, 2^204664560 is an apocalyptic number.

204664560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204664560 is an abundant number, since it is smaller than the sum of its proper divisors (429796320).

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

204664560 is a wasteful number, since it uses less digits than its factorization.

204664560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852785 (or 852779 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 204664560 is about 14306.1021945183. The cubic root of 204664560 is about 589.3150722669.

The spelling of 204664560 in words is "two hundred four million, six hundred sixty-four thousand, five hundred sixty".