205730456 has 16 divisors (see below), whose sum is σ = 395153640. Its totient is φ = 100356160.

The previous prime is 205730431. The next prime is 205730513. The reversal of 205730456 is 654037502.

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 3 ways as a sum of consecutive naturals, for example, 313286 + ... + 313941.

Almost surely, 2^205730456 is an apocalyptic number.

It is an amenable number.

205730456 is a deficient number, since it is larger than the sum of its proper divisors (189423184).

205730456 is a wasteful number, since it uses less digits than its factorization.

205730456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627274 (or 627270 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 32.

The square root of 205730456 is about 14343.3070105886. The cubic root of 205730456 is about 590.3363551789.

Adding to 205730456 its reverse (654037502), we get a palindrome (859767958).

The spelling of 205730456 in words is "two hundred five million, seven hundred thirty thousand, four hundred fifty-six".