205304340 has 48 divisors (see below), whose sum is σ = 594679680. Its totient is φ = 52859520.

The previous prime is 205304327. The next prime is 205304353. The reversal of 205304340 is 43403502.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (205304327) and next prime (205304353).

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, 57256 + ... + 60735.

It is an arithmetic number, because the mean of its divisors is an integer number (12389160).

Almost surely, 2^205304340 is an apocalyptic number.

205304340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205304340 is an abundant number, since it is smaller than the sum of its proper divisors (389375340).

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

205304340 is a wasteful number, since it uses less digits than its factorization.

205304340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118032 (or 118030 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 205304340 is about 14328.4451354639. The cubic root of 205304340 is about 589.9284984691.

Adding to 205304340 its reverse (43403502), we get a palindrome (248707842).

The spelling of 205304340 in words is "two hundred five million, three hundred four thousand, three hundred forty".