205438672 has 20 divisors (see below), whose sum is σ = 398699680. Its totient is φ = 102548448.

The previous prime is 205438669. The next prime is 205438679. The reversal of 205438672 is 276834502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205438679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 468 + ... + 20275.

It is an arithmetic number, because the mean of its divisors is an integer number (19934984).

Almost surely, 2^205438672 is an apocalyptic number.

It is an amenable number.

205438672 is a deficient number, since it is larger than the sum of its proper divisors (193261008).

205438672 is a wasteful number, since it uses less digits than its factorization.

205438672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21370 (or 21364 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 205438672 is about 14333.1319675778. The cubic root of 205438672 is about 590.0571351353.

The spelling of 205438672 in words is "two hundred five million, four hundred thirty-eight thousand, six hundred seventy-two".