205672806 has 12 divisors (see below), whose sum is σ = 445624452. Its totient is φ = 68557596.

The previous prime is 205672771. The next prime is 205672823. The reversal of 205672806 is 608276502.

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 5 ways as a sum of consecutive naturals, for example, 5713116 + ... + 5713151.

It is an arithmetic number, because the mean of its divisors is an integer number (37135371).

Almost surely, 2^205672806 is an apocalyptic number.

205672806 is an abundant number, since it is smaller than the sum of its proper divisors (239951646).

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

205672806 is a wasteful number, since it uses less digits than its factorization.

205672806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11426275 (or 11426272 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 205672806 is about 14341.2972216602. The cubic root of 205672806 is about 590.2812084739.

The spelling of 205672806 in words is "two hundred five million, six hundred seventy-two thousand, eight hundred six".