204134240 has 24 divisors (see below), whose sum is σ = 482267520. Its totient is φ = 81653632.

The previous prime is 204134237. The next prime is 204134251. The reversal of 204134240 is 42431402.

It is a Harshad number since it is a multiple of its sum of digits (20).

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 3 ways as a sum of consecutive naturals, for example, 637760 + ... + 638079.

It is an arithmetic number, because the mean of its divisors is an integer number (20094480).

Almost surely, 2^204134240 is an apocalyptic number.

204134240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204134240 is an abundant number, since it is smaller than the sum of its proper divisors (278133280).

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

204134240 is a wasteful number, since it uses less digits than its factorization.

204134240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1275854 (or 1275846 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 204134240 is about 14287.5554242145. Note that the first 3 decimals coincide. The cubic root of 204134240 is about 588.8056274568.

Adding to 204134240 its reverse (42431402), we get a palindrome (246565642).

The spelling of 204134240 in words is "two hundred four million, one hundred thirty-four thousand, two hundred forty".