180323640 has 192 divisors, whose sum is σ = 675417600. Its totient is φ = 40870656.

The previous prime is 180323597. The next prime is 180323659. The reversal of 180323640 is 46323081.

It is a happy number.

180323640 is a `hidden beast` number, since 18 + 0 + 3 + 2 + 3 + 640 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 410541 + ... + 410979.

It is an arithmetic number, because the mean of its divisors is an integer number (3517800).

Almost surely, 2^180323640 is an apocalyptic number.

180323640 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 180323640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (337708800).

180323640 is an abundant number, since it is smaller than the sum of its proper divisors (495093960).

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

180323640 is a wasteful number, since it uses less digits than its factorization.

180323640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626 (or 619 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 180323640 is about 13428.4637989608. The cubic root of 180323640 is about 564.9598112746.

The spelling of 180323640 in words is "one hundred eighty million, three hundred twenty-three thousand, six hundred forty".