180820716 has 12 divisors (see below), whose sum is σ = 421915032. Its totient is φ = 60273568.

The previous prime is 180820711. The next prime is 180820727. The reversal of 180820716 is 617028081.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×180820716² = 65392262669505312, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (180820711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7534185 + ... + 7534208.

It is an arithmetic number, because the mean of its divisors is an integer number (35159586).

Almost surely, 2^180820716 is an apocalyptic number.

It is an amenable number.

180820716 is an abundant number, since it is smaller than the sum of its proper divisors (241094316).

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

180820716 is a wasteful number, since it uses less digits than its factorization.

180820716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15068400 (or 15068398 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 33.

The square root of 180820716 is about 13446.9593589034. The cubic root of 180820716 is about 565.4784534158.

Adding to 180820716 its reverse (617028081), we get a palindrome (797848797).

The spelling of 180820716 in words is "one hundred eighty million, eight hundred twenty thousand, seven hundred sixteen".