180065280 has 176 divisors, whose sum is σ = 607222080. Its totient is φ = 45416448.

The previous prime is 180065269. The next prime is 180065287. The reversal of 180065280 is 82560081.

It is a super-2 number, since 2×180065280² = 64847010122956800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180065287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 291532 + ... + 292148.

Almost surely, 2^180065280 is an apocalyptic number.

180065280 is a gapful number since it is divisible by the number (10) 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 180065280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (303611040).

180065280 is an abundant number, since it is smaller than the sum of its proper divisors (427156800).

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

180065280 is a wasteful number, since it uses less digits than its factorization.

180065280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664 (or 646 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 180065280 is about 13418.8404864206. The cubic root of 180065280 is about 564.6898655588.

The spelling of 180065280 in words is "one hundred eighty million, sixty-five thousand, two hundred eighty".