205728670 has 16 divisors (see below), whose sum is σ = 423213408. Its totient is φ = 70535520.

The previous prime is 205728667. The next prime is 205728703. The reversal of 205728670 is 76827502.

205728670 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1469421 + ... + 1469560.

It is an arithmetic number, because the mean of its divisors is an integer number (26450838).

Almost surely, 2^205728670 is an apocalyptic number.

205728670 is an abundant number, since it is smaller than the sum of its proper divisors (217484738).

205728670 is a wasteful number, since it uses less digits than its factorization.

205728670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2938995.

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 205728670 is about 14343.2447514501. The cubic root of 205728670 is about 590.3346468858.

The spelling of 205728670 in words is "two hundred five million, seven hundred twenty-eight thousand, six hundred seventy".