204720270 has 32 divisors (see below), whose sum is σ = 499387680. Its totient is φ = 53696640.

The previous prime is 204720253. The next prime is 204720281. The reversal of 204720270 is 72027402.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 204720270.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54105 + ... + 57764.

It is an arithmetic number, because the mean of its divisors is an integer number (15605865).

Almost surely, 2^204720270 is an apocalyptic number.

204720270 is an abundant number, since it is smaller than the sum of its proper divisors (294667410).

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

204720270 is a wasteful number, since it uses less digits than its factorization.

204720270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111940.

The product of its (nonzero) digits is 1568, while the sum is 24.

The square root of 204720270 is about 14308.0491332676. The cubic root of 204720270 is about 589.3685382313.

Adding to 204720270 its reverse (72027402), we get a palindrome (276747672).

The spelling of 204720270 in words is "two hundred four million, seven hundred twenty thousand, two hundred seventy".