204640450 has 48 divisors (see below), whose sum is σ = 457917120. Its totient is φ = 66467520.

The previous prime is 204640417. The next prime is 204640477. The reversal of 204640450 is 54046402.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8737 + ... + 22036.

It is an arithmetic number, because the mean of its divisors is an integer number (9539940).

Almost surely, 2^204640450 is an apocalyptic number.

204640450 is an abundant number, since it is smaller than the sum of its proper divisors (253276670).

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

204640450 is a wasteful number, since it uses less digits than its factorization.

204640450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30811 (or 30806 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 204640450 is about 14305.2595222876. The cubic root of 204640450 is about 589.2919304255.

Adding to 204640450 its reverse (54046402), we get a palindrome (258686852).

The spelling of 204640450 in words is "two hundred four million, six hundred forty thousand, four hundred fifty".