204240402 has 24 divisors (see below), whose sum is σ = 444176460. Its totient is φ = 67825440.

The previous prime is 204240373. The next prime is 204240403. The reversal of 204240402 is 204042402.

204240402 is a `hidden beast` number, since 20 + 4 + 240 + 402 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 147403881 + 56836521 = 12141^2 + 7539^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (204240403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16249 + ... + 25932.

Almost surely, 2^204240402 is an apocalyptic number.

204240402 is an abundant number, since it is smaller than the sum of its proper divisors (239936058).

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

204240402 is a wasteful number, since it uses less digits than its factorization.

204240402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42458 (or 42455 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 204240402 is about 14291.2701324970. The cubic root of 204240402 is about 588.9076811349.

Adding to 204240402 its reverse (204042402), we get a palindrome (408282804).

The spelling of 204240402 in words is "two hundred four million, two hundred forty thousand, four hundred two".