180211808 has 144 divisors (see below), whose sum is σ = 455051520. Its totient is φ = 69721344.

The previous prime is 180211807. The next prime is 180211859. The reversal of 180211808 is 808112081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180211807) 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, 685085 + ... + 685347.

It is an arithmetic number, because the mean of its divisors is an integer number (3160080).

Almost surely, 2^180211808 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 180211808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (227525760).

180211808 is an abundant number, since it is smaller than the sum of its proper divisors (274839712).

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

180211808 is a wasteful number, since it uses less digits than its factorization.

180211808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329 (or 314 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 29.

The square root of 180211808 is about 13424.2991623399. The cubic root of 180211808 is about 564.8429960286.

Adding to 180211808 its reverse (808112081), we get a palindrome (988323889).

The spelling of 180211808 in words is "one hundred eighty million, two hundred eleven thousand, eight hundred eight".