205770146 has 8 divisors (see below), whose sum is σ = 308774700. Its totient is φ = 102845248.

The previous prime is 205770143. The next prime is 205770161. The reversal of 205770146 is 641077502.

It can be written as a sum of positive squares in 2 ways, for example, as 176491225 + 29278921 = 13285^2 + 5411^2 .

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

It is a super-2 number, since 2×205770146² = 84682705969722632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (205770143) by changing a digit.

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, 12971 + ... + 24078.

Almost surely, 2^205770146 is an apocalyptic number.

205770146 is a deficient number, since it is larger than the sum of its proper divisors (103004554).

205770146 is a wasteful number, since it uses less digits than its factorization.

205770146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39828.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 205770146 is about 14344.6905160063. The cubic root of 205770146 is about 590.3743157606.

The spelling of 205770146 in words is "two hundred five million, seven hundred seventy thousand, one hundred forty-six".