206028172 has 48 divisors (see below), whose sum is σ = 441987840. Its totient is φ = 82060992.

The previous prime is 206028169. The next prime is 206028197. The reversal of 206028172 is 271820602.

It is a super-3 number, since 3×206028172³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 206028172.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24543 + ... + 31849.

It is an arithmetic number, because the mean of its divisors is an integer number (9208080).

Almost surely, 2^206028172 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 206028172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220993920).

206028172 is an abundant number, since it is smaller than the sum of its proper divisors (235959668).

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

206028172 is a wasteful number, since it uses less digits than its factorization.

206028172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7390 (or 7388 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 206028172 is about 14353.6814789795. The cubic root of 206028172 is about 590.6209798146.

Adding to 206028172 its reverse (271820602), we get a palindrome (477848774).

The spelling of 206028172 in words is "two hundred six million, twenty-eight thousand, one hundred seventy-two".