205769172 has 48 divisors (see below), whose sum is σ = 549642240. Its totient is φ = 58692192.

The previous prime is 205769171. The next prime is 205769189. The reversal of 205769172 is 271967502.

It is a self number, because there is not a number n which added to its sum of digits gives 205769172.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205769171) 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 15 ways as a sum of consecutive naturals, for example, 58693 + ... + 62099.

It is an arithmetic number, because the mean of its divisors is an integer number (11450880).

Almost surely, 2^205769172 is an apocalyptic number.

It is an amenable number.

205769172 is an abundant number, since it is smaller than the sum of its proper divisors (343873068).

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

205769172 is a wasteful number, since it uses less digits than its factorization.

205769172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4140 (or 4138 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 39.

The square root of 205769172 is about 14344.6565661225. The cubic root of 205769172 is about 590.3733842593.

The spelling of 205769172 in words is "two hundred five million, seven hundred sixty-nine thousand, one hundred seventy-two".