204009072 has 20 divisors (see below), whose sum is σ = 527023560. Its totient is φ = 68003008.

The previous prime is 204009067. The next prime is 204009101. The reversal of 204009072 is 270900402.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 2125047 + ... + 2125142.

It is an arithmetic number, because the mean of its divisors is an integer number (26351178).

Almost surely, 2^204009072 is an apocalyptic number.

It is an amenable number.

204009072 is an abundant number, since it is smaller than the sum of its proper divisors (323014488).

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

204009072 is a wasteful number, since it uses less digits than its factorization.

204009072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4250200 (or 4250194 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 204009072 is about 14283.1744370781. The cubic root of 204009072 is about 588.6852578229.

Adding to 204009072 its reverse (270900402), we get a palindrome (474909474).

The spelling of 204009072 in words is "two hundred four million, nine thousand, seventy-two".