206328780 has 72 divisors (see below), whose sum is σ = 715277472. Its totient is φ = 47160576.

The previous prime is 206328767. The next prime is 206328781. The reversal of 206328780 is 87823602.

It is a happy number.

206328780 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (206328781) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 80617 + ... + 83136.

Almost surely, 2^206328780 is an apocalyptic number.

206328780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206328780 is an abundant number, since it is smaller than the sum of its proper divisors (508948692).

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

206328780 is a wasteful number, since it uses less digits than its factorization.

206328780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163775 (or 163770 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 206328780 is about 14364.1491220330. The cubic root of 206328780 is about 590.9080912158.

The spelling of 206328780 in words is "two hundred six million, three hundred twenty-eight thousand, seven hundred eighty".