204668780 has 48 divisors (see below), whose sum is σ = 457591680. Its totient is φ = 76627968.

The previous prime is 204668773. The next prime is 204668801. The reversal of 204668780 is 87866402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64061 + ... + 67179.

It is an arithmetic number, because the mean of its divisors is an integer number (9533160).

Almost surely, 2^204668780 is an apocalyptic number.

204668780 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 204668780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228795840).

204668780 is an abundant number, since it is smaller than the sum of its proper divisors (252922900).

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

204668780 is a wasteful number, since it uses less digits than its factorization.

204668780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3338 (or 3336 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 204668780 is about 14306.2496832678. The cubic root of 204668780 is about 589.3191226221.

The spelling of 204668780 in words is "two hundred four million, six hundred sixty-eight thousand, seven hundred eighty".