206785428 has 24 divisors (see below), whose sum is σ = 499138080. Its totient is φ = 66551520.

The previous prime is 206785357. The next prime is 206785451. The reversal of 206785428 is 824587602.

It is a happy number.

206785428 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 206785428.

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 7 ways as a sum of consecutive naturals, for example, 296758 + ... + 297453.

It is an arithmetic number, because the mean of its divisors is an integer number (20797420).

Almost surely, 2^206785428 is an apocalyptic number.

It is an amenable number.

206785428 is an abundant number, since it is smaller than the sum of its proper divisors (292352652).

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

206785428 is a wasteful number, since it uses less digits than its factorization.

206785428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594247 (or 594245 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 42.

The square root of 206785428 is about 14380.0357440446. The cubic root of 206785428 is about 591.3437036951.

It can be divided in two parts, 20678 and 5428, that added together give a triangular number (26106 = T₂₂₈).

The spelling of 206785428 in words is "two hundred six million, seven hundred eighty-five thousand, four hundred twenty-eight".