206128392 has 64 divisors (see below), whose sum is σ = 540190080. Its totient is φ = 65421312.

The previous prime is 206128387. The next prime is 206128399. The reversal of 206128392 is 293821602.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (206128399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141138 + ... + 142590.

It is an arithmetic number, because the mean of its divisors is an integer number (8440470).

Almost surely, 2^206128392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206128392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270095040).

206128392 is an abundant number, since it is smaller than the sum of its proper divisors (334061688).

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

206128392 is a wasteful number, since it uses less digits than its factorization.

206128392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1742 (or 1738 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 206128392 is about 14357.1721449595. The cubic root of 206128392 is about 590.7167311850.

Adding to 206128392 its reverse (293821602), we get a palindrome (499949994).

The spelling of 206128392 in words is "two hundred six million, one hundred twenty-eight thousand, three hundred ninety-two".