204412540 has 24 divisors (see below), whose sum is σ = 439251120. Its totient is φ = 79863168.

The previous prime is 204412529. The next prime is 204412547. The reversal of 204412540 is 45214402.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204412547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117985 + ... + 119704.

It is an arithmetic number, because the mean of its divisors is an integer number (18302130).

Almost surely, 2^204412540 is an apocalyptic number.

204412540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

204412540 is an abundant number, since it is smaller than the sum of its proper divisors (234838580).

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

204412540 is a wasteful number, since it uses less digits than its factorization.

204412540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237741 (or 237739 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 204412540 is about 14297.2913518610. The cubic root of 204412540 is about 589.0730825000.

Adding to 204412540 its reverse (45214402), we get a palindrome (249626942).

The spelling of 204412540 in words is "two hundred four million, four hundred twelve thousand, five hundred forty".