209429328 has 20 divisors (see below), whose sum is σ = 541025888. Its totient is φ = 69809760.

The previous prime is 209429323. The next prime is 209429333. The reversal of 209429328 is 823924902.

It is a happy number.

209429328 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (209429323) and next prime (209429333).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209429323) 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, 2181508 + ... + 2181603.

Almost surely, 2^209429328 is an apocalyptic number.

It is an amenable number.

209429328 is an abundant number, since it is smaller than the sum of its proper divisors (331596560).

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

209429328 is a wasteful number, since it uses less digits than its factorization.

209429328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4363122 (or 4363116 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 209429328 is about 14471.6732964782. The cubic root of 209429328 is about 593.8532893917.

The spelling of 209429328 in words is "two hundred nine million, four hundred twenty-nine thousand, three hundred twenty-eight".