205604634 has 24 divisors (see below), whose sum is σ = 422640288. Its totient is φ = 66679920.

The previous prime is 205604621. The next prime is 205604669. The reversal of 205604634 is 436406502.

It is a super-3 number, since 3×205604634³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4302 + ... + 20729.

It is an arithmetic number, because the mean of its divisors is an integer number (17610012).

Almost surely, 2^205604634 is an apocalyptic number.

205604634 is an abundant number, since it is smaller than the sum of its proper divisors (217035654).

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

205604634 is a wasteful number, since it uses less digits than its factorization.

205604634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25110 (or 25073 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 205604634 is about 14338.9202522366. The cubic root of 205604634 is about 590.2159833587.

The spelling of 205604634 in words is "two hundred five million, six hundred four thousand, six hundred thirty-four".