205891872 has 24 divisors (see below), whose sum is σ = 540466416. Its totient is φ = 68630592.

The previous prime is 205891859. The next prime is 205891927. The reversal of 205891872 is 278198502.

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1072258 + ... + 1072449.

It is an arithmetic number, because the mean of its divisors is an integer number (22519434).

Almost surely, 2^205891872 is an apocalyptic number.

It is an amenable number.

205891872 is an abundant number, since it is smaller than the sum of its proper divisors (334574544).

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

205891872 is a wasteful number, since it uses less digits than its factorization.

205891872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2144720 (or 2144712 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 205891872 is about 14348.9327826149. The cubic root of 205891872 is about 590.4907073418.

The spelling of 205891872 in words is "two hundred five million, eight hundred ninety-one thousand, eight hundred seventy-two".