204640272 has 30 divisors (see below), whose sum is σ = 572708942. Its totient is φ = 68213376.

The previous prime is 204640253. The next prime is 204640313. The reversal of 204640272 is 272046402.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 154853136 + 49787136 = 12444^2 + 7056^2 .

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 710413 + ... + 710700.

Almost surely, 2^204640272 is an apocalyptic number.

It is an amenable number.

204640272 is an abundant number, since it is smaller than the sum of its proper divisors (368068670).

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

204640272 is a wasteful number, since it uses less digits than its factorization.

204640272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1421127 (or 1421118 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 204640272 is about 14305.2533007983. The cubic root of 204640272 is about 589.2917595665.

Adding to 204640272 its reverse (272046402), we get a palindrome (476686674).

The spelling of 204640272 in words is "two hundred four million, six hundred forty thousand, two hundred seventy-two".