206720828 has 12 divisors (see below), whose sum is σ = 363656832. Its totient is φ = 102818880.

The previous prime is 206720827. The next prime is 206720869. The reversal of 206720828 is 828027602.

206720828 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 not an unprimeable number, because it can be changed into a prime (206720827) 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, 134525 + ... + 136052.

It is an arithmetic number, because the mean of its divisors is an integer number (30304736).

Almost surely, 2^206720828 is an apocalyptic number.

It is an amenable number.

206720828 is a deficient number, since it is larger than the sum of its proper divisors (156936004).

206720828 is a wasteful number, since it uses less digits than its factorization.

206720828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270772 (or 270770 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 206720828 is about 14377.7893989306. The cubic root of 206720828 is about 591.2821184691.

The spelling of 206720828 in words is "two hundred six million, seven hundred twenty thousand, eight hundred twenty-eight".