180817812 has 96 divisors (see below), whose sum is σ = 559104000. Its totient is φ = 49411296.

The previous prime is 180817801. The next prime is 180817817. The reversal of 180817812 is 218718081.

180817812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×180817812² = 65390162272934688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180817817) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12189 + ... + 22587.

It is an arithmetic number, because the mean of its divisors is an integer number (5824000).

Almost surely, 2^180817812 is an apocalyptic number.

180817812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 180817812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (279552000).

180817812 is an abundant number, since it is smaller than the sum of its proper divisors (378286188).

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

180817812 is a wasteful number, since it uses less digits than its factorization.

180817812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10442 (or 10434 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 36.

The square root of 180817812 is about 13446.8513786685. The cubic root of 180817812 is about 565.4754261849.

The spelling of 180817812 in words is "one hundred eighty million, eight hundred seventeen thousand, eight hundred twelve".