205340430 has 32 divisors (see below), whose sum is σ = 494753184. Its totient is φ = 54542336.

The previous prime is 205340393. The next prime is 205340479. The reversal of 205340430 is 34043502.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 205340397 and 205340406.

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, 5607 + ... + 21026.

It is an arithmetic number, because the mean of its divisors is an integer number (15461037).

Almost surely, 2^205340430 is an apocalyptic number.

205340430 is an abundant number, since it is smaller than the sum of its proper divisors (289412754).

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

205340430 is a wasteful number, since it uses less digits than its factorization.

205340430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26900.

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

The square root of 205340430 is about 14329.7044631074. The cubic root of 205340430 is about 589.9630638564.

Adding to 205340430 its reverse (34043502), we get a palindrome (239383932).

The spelling of 205340430 in words is "two hundred five million, three hundred forty thousand, four hundred thirty".