205465670 has 64 divisors (see below), whose sum is σ = 400619520. Its totient is φ = 75681408.

The previous prime is 205465657. The next prime is 205465679. The reversal of 205465670 is 76564502.

It is a super-2 number, since 2×205465670² = 84432283097097800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 205465670.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205465679) 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 31 ways as a sum of consecutive naturals, for example, 897116 + ... + 897344.

It is an arithmetic number, because the mean of its divisors is an integer number (6259680).

Almost surely, 2^205465670 is an apocalyptic number.

205465670 is a deficient number, since it is larger than the sum of its proper divisors (195153850).

205465670 is a wasteful number, since it uses less digits than its factorization.

205465670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389.

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 205465670 is about 14334.0737405666. The cubic root of 205465670 is about 590.0829817210.

The spelling of 205465670 in words is "two hundred five million, four hundred sixty-five thousand, six hundred seventy".