205490946 has 8 divisors (see below), whose sum is σ = 410981904. Its totient is φ = 68496980.

The previous prime is 205490921. The next prime is 205490959. The reversal of 205490946 is 649094502.

It is a sphenic number, since it is the product of 3 distinct primes.

205490946 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17124240 + ... + 17124251.

It is an arithmetic number, because the mean of its divisors is an integer number (51372738).

Almost surely, 2^205490946 is an apocalyptic number.

205490946 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

205490946 is a wasteful number, since it uses less digits than its factorization.

205490946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34248496.

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 205490946 is about 14334.9553888389. The cubic root of 205490946 is about 590.1071776948.

The spelling of 205490946 in words is "two hundred five million, four hundred ninety thousand, nine hundred forty-six".