205045340 has 48 divisors (see below), whose sum is σ = 461855520. Its totient is φ = 76227840.

The previous prime is 205045333. The next prime is 205045403. The reversal of 205045340 is 43540502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15050 + ... + 25230.

It is an arithmetic number, because the mean of its divisors is an integer number (9621990).

Almost surely, 2^205045340 is an apocalyptic number.

205045340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 205045340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230927760).

205045340 is an abundant number, since it is smaller than the sum of its proper divisors (256810180).

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

205045340 is a wasteful number, since it uses less digits than its factorization.

205045340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10262 (or 10260 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 205045340 is about 14319.4043172193. The cubic root of 205045340 is about 589.6803209308.

Adding to 205045340 its reverse (43540502), we get a palindrome (248585842).

The spelling of 205045340 in words is "two hundred five million, forty-five thousand, three hundred forty".