205897928 has 8 divisors (see below), whose sum is σ = 386058630. Its totient is φ = 102948960.

The previous prime is 205897903. The next prime is 205897943. The reversal of 205897928 is 829798502.

205897928 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 136375684 + 69522244 = 11678^2 + 8338^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12868613 + ... + 12868628.

Almost surely, 2^205897928 is an apocalyptic number.

It is an amenable number.

205897928 is a deficient number, since it is larger than the sum of its proper divisors (180160702).

205897928 is a wasteful number, since it uses less digits than its factorization.

205897928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25737247 (or 25737243 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 50.

The square root of 205897928 is about 14349.1438072102. The cubic root of 205897928 is about 590.4964967506.

The spelling of 205897928 in words is "two hundred five million, eight hundred ninety-seven thousand, nine hundred twenty-eight".