204655980 has 24 divisors (see below), whose sum is σ = 573036912. Its totient is φ = 54574912.

The previous prime is 204655967. The next prime is 204655981. The reversal of 204655980 is 89556402.

204655980 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (204655981) 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, 1705407 + ... + 1705526.

It is an arithmetic number, because the mean of its divisors is an integer number (23876538).

Almost surely, 2^204655980 is an apocalyptic number.

204655980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204655980 is an abundant number, since it is smaller than the sum of its proper divisors (368380932).

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

204655980 is a wasteful number, since it uses less digits than its factorization.

204655980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3410945 (or 3410943 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 204655980 is about 14305.8023193388. The cubic root of 204655980 is about 589.3068370128.

The spelling of 204655980 in words is "two hundred four million, six hundred fifty-five thousand, nine hundred eighty".