206216728 has 16 divisors (see below), whose sum is σ = 407007000. Its totient is φ = 97681536.

The previous prime is 206216719. The next prime is 206216729. The reversal of 206216728 is 827612602.

It is a junction number, because it is equal to n+sod(n) for n = 206216693 and 206216702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206216729) 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, 678193 + ... + 678496.

Almost surely, 2^206216728 is an apocalyptic number.

It is an amenable number.

206216728 is a deficient number, since it is larger than the sum of its proper divisors (200790272).

206216728 is a wasteful number, since it uses less digits than its factorization.

206216728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1356714 (or 1356710 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 206216728 is about 14360.2481872703. The cubic root of 206216728 is about 590.8011027108.

The spelling of 206216728 in words is "two hundred six million, two hundred sixteen thousand, seven hundred twenty-eight".