206216928 has 60 divisors (see below), whose sum is σ = 606485880. Its totient is φ = 68738112.

The previous prime is 206216917. The next prime is 206216951. The reversal of 206216928 is 829612602.

It is a happy number.

206216928 is a `hidden beast` number, since 2 + 0 + 621 + 6 + 9 + 28 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 206216892 and 206216901.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 37188 + ... + 42371.

It is an arithmetic number, because the mean of its divisors is an integer number (10108098).

Almost surely, 2^206216928 is an apocalyptic number.

It is an amenable number.

206216928 is an abundant number, since it is smaller than the sum of its proper divisors (400268952).

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

206216928 is an equidigital number, since it uses as much as digits as its factorization.

206216928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79581 (or 79564 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 206216928 is about 14360.2551509366. The cubic root of 206216928 is about 590.8012937075.

The spelling of 206216928 in words is "two hundred six million, two hundred sixteen thousand, nine hundred twenty-eight".