205400330 has 32 divisors (see below), whose sum is σ = 384037200. Its totient is φ = 79002112.

The previous prime is 205400329. The next prime is 205400339. The reversal of 205400330 is 33004502.

It can be written as a sum of positive squares in 8 ways, for example, as 15594601 + 189805729 = 3949^2 + 13777^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 205400299 and 205400308.

It is not an unprimeable number, because it can be changed into a prime (205400339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76694 + ... + 79326.

Almost surely, 2^205400330 is an apocalyptic number.

205400330 is a deficient number, since it is larger than the sum of its proper divisors (178636870).

205400330 is a wasteful number, since it uses less digits than its factorization.

205400330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2938.

The product of its (nonzero) digits is 360, while the sum is 17.

The square root of 205400330 is about 14331.7943747460. The cubic root of 205400330 is about 590.0204244581.

Adding to 205400330 its reverse (33004502), we get a palindrome (238404832).

The spelling of 205400330 in words is "two hundred five million, four hundred thousand, three hundred thirty".