204978630 has 16 divisors (see below), whose sum is σ = 491948784. Its totient is φ = 54660960.

The previous prime is 204978629. The next prime is 204978637. The reversal of 204978630 is 36879402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204978637) 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, 3416281 + ... + 3416340.

It is an arithmetic number, because the mean of its divisors is an integer number (30746799).

Almost surely, 2^204978630 is an apocalyptic number.

204978630 is an abundant number, since it is smaller than the sum of its proper divisors (286970154).

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

204978630 is a wasteful number, since it uses less digits than its factorization.

204978630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6832631.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 204978630 is about 14317.0747710557. The cubic root of 204978630 is about 589.6163646028.

The spelling of 204978630 in words is "two hundred four million, nine hundred seventy-eight thousand, six hundred thirty".