206421328 has 40 divisors (see below), whose sum is σ = 411589728. Its totient is φ = 100232832.

The previous prime is 206421323. The next prime is 206421331. The reversal of 206421328 is 823124602.

206421328 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 206421296 and 206421305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206421323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134775 + ... + 136297.

Almost surely, 2^206421328 is an apocalyptic number.

It is an amenable number.

206421328 is a deficient number, since it is larger than the sum of its proper divisors (205168400).

206421328 is a wasteful number, since it uses less digits than its factorization.

206421328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1771 (or 1765 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 206421328 is about 14367.3702534597. The cubic root of 206421328 is about 590.9964278784.

The spelling of 206421328 in words is "two hundred six million, four hundred twenty-one thousand, three hundred twenty-eight".